diff --git a/code/__defines/mobs.dm b/code/__defines/mobs.dm
index 5bcab4704d..e99f62d2b7 100644
--- a/code/__defines/mobs.dm
+++ b/code/__defines/mobs.dm
@@ -107,3 +107,10 @@
 
 #define COMPANY_ALIGNMENTS		list(COMPANY_LOYAL,COMPANY_SUPPORTATIVE,COMPANY_NEUTRAL,COMPANY_SKEPTICAL,COMPANY_OPPOSED)
 
+
+// Defines mob sizes, used by lockers and to determine what is considered a small sized mob, etc.
+#define MOB_LARGE  		40
+#define MOB_MEDIUM 		20
+#define MOB_SMALL 		10
+#define MOB_TINY 		5
+#define MOB_MINISCULE	1
diff --git a/code/game/machinery/doors/door.dm b/code/game/machinery/doors/door.dm
index 692cda28bd..daa2123d1c 100644
--- a/code/game/machinery/doors/door.dm
+++ b/code/game/machinery/doors/door.dm
@@ -99,7 +99,7 @@
 		var/mob/M = AM
 		if(world.time - M.last_bumped <= 10) return	//Can bump-open one airlock per second. This is to prevent shock spam.
 		M.last_bumped = world.time
-		if(!M.restrained() && !M.small)
+		if(!M.restrained() && !issmall(M))
 			bumpopen(M)
 		return
 
diff --git a/code/game/machinery/doors/windowdoor.dm b/code/game/machinery/doors/windowdoor.dm
index e50af2bcf0..88eda4c774 100644
--- a/code/game/machinery/doors/windowdoor.dm
+++ b/code/game/machinery/doors/windowdoor.dm
@@ -77,7 +77,7 @@
 		return
 	if (src.operating)
 		return
-	if (src.density && !M.small && src.allowed(AM))
+	if (src.density && !issmall(M) && src.allowed(AM))
 		open()
 		if(src.check_access(null))
 			sleep(50)
diff --git a/code/game/machinery/floor_light.dm b/code/game/machinery/floor_light.dm
index 0eff1a3e3c..9267f1edbe 100644
--- a/code/game/machinery/floor_light.dm
+++ b/code/game/machinery/floor_light.dm
@@ -43,7 +43,7 @@ var/list/floor_light_cache = list()
 
 /obj/machinery/floor_light/attack_hand(var/mob/user)
 
-	if(user.a_intent == "hurt" && !user.small)
+	if(user.a_intent == I_HURT && !issmall(user))
 		if(!isnull(damaged) && !(stat & BROKEN))
 			visible_message("<span class='danger'>\The [user] smashes \the [src]!</span>")
 			playsound(src, "shatter", 70, 1)
diff --git a/code/game/machinery/kitchen/gibber.dm b/code/game/machinery/kitchen/gibber.dm
index 3d18d80a1e..9a950cc023 100644
--- a/code/game/machinery/kitchen/gibber.dm
+++ b/code/game/machinery/kitchen/gibber.dm
@@ -88,7 +88,7 @@
 	emagged = !emagged
 	user << "<span class='danger'>You [emagged ? "disable" : "enable"] the gibber safety guard.</span>"
 	return 1
-	
+
 /obj/machinery/gibber/attackby(var/obj/item/W, var/mob/user)
 	var/obj/item/weapon/grab/G = W
 
@@ -195,7 +195,7 @@
 		slab_type = H.species.meat_type
 
 	// Small mobs don't give as much nutrition.
-	if(src.occupant.small)
+	if(issmall(src.occupant))
 		slab_nutrition *= 0.5
 	slab_nutrition /= slab_count
 
diff --git a/code/game/objects/items/bodybag.dm b/code/game/objects/items/bodybag.dm
index 68084ff5c9..081767fe6f 100644
--- a/code/game/objects/items/bodybag.dm
+++ b/code/game/objects/items/bodybag.dm
@@ -39,7 +39,7 @@
 	close_sound = 'sound/items/zip.ogg'
 	var/item_path = /obj/item/bodybag
 	density = 0
-	storage_capacity = (default_mob_size * 2) - 1
+	storage_capacity = (MOB_MEDIUM * 2) - 1
 	var/contains_body = 0
 
 /obj/structure/closet/body_bag/attackby(W as obj, mob/user as mob)
diff --git a/code/game/objects/items/weapons/material/twohanded.dm b/code/game/objects/items/weapons/material/twohanded.dm
index 6102c76026..aac0b98679 100644
--- a/code/game/objects/items/weapons/material/twohanded.dm
+++ b/code/game/objects/items/weapons/material/twohanded.dm
@@ -92,7 +92,7 @@
 
 	if(istype(user, /mob/living/carbon/human))
 		var/mob/living/carbon/human/H = user
-		if(H.species.is_small)
+		if(issmall(H))
 			user << "<span class='warning'>It's too heavy for you to wield fully.</span>"
 			return
 	else
@@ -175,7 +175,7 @@
 		else if(istype(A,/obj/effect/plant))
 			var/obj/effect/plant/P = A
 			P.die_off()
-
+
 //spears, bay edition
 /obj/item/weapon/material/twohanded/spear
 	icon_state = "spearglass0"
diff --git a/code/game/objects/items/weapons/storage/internal.dm b/code/game/objects/items/weapons/storage/internal.dm
index 89f058ba47..b135c439b6 100644
--- a/code/game/objects/items/weapons/storage/internal.dm
+++ b/code/game/objects/items/weapons/storage/internal.dm
@@ -9,7 +9,7 @@
 	name = master_item.name
 	verbs -= /obj/item/verb/verb_pickup	//make sure this is never picked up.
 	..()
-	
+
 /obj/item/weapon/storage/internal/Destroy()
 	master_item = null
 	..()
diff --git a/code/game/objects/structures/crates_lockers/closets.dm b/code/game/objects/structures/crates_lockers/closets.dm
index 5bbaeac7a5..b680002df8 100644
--- a/code/game/objects/structures/crates_lockers/closets.dm
+++ b/code/game/objects/structures/crates_lockers/closets.dm
@@ -11,7 +11,7 @@
 	var/wall_mounted = 0 //never solid (You can always pass over it)
 	var/health = 100
 	var/breakout = 0 //if someone is currently breaking out. mutex
-	var/storage_capacity = 30 //This is so that someone can't pack hundreds of items in a locker/crate
+	var/storage_capacity = 2 * MOB_MEDIUM //This is so that someone can't pack hundreds of items in a locker/crate
 							  //then open it in a populated area to crash clients.
 	var/open_sound = 'sound/machines/click.ogg'
 	var/close_sound = 'sound/machines/click.ogg'
@@ -20,8 +20,6 @@
 	var/store_items = 1
 	var/store_mobs = 1
 
-	var/const/default_mob_size = 15
-
 /obj/structure/closet/initialize()
 	if(!opened)		// if closed, any item at the crate's loc is put in the contents
 		var/obj/item/I
@@ -145,14 +143,13 @@
 	for(var/mob/living/M in src.loc)
 		if(M.buckled || M.pinned.len)
 			continue
-		var/current_mob_size = (M.mob_size ? M.mob_size : default_mob_size)
-		if(stored_units + added_units + current_mob_size > storage_capacity)
+		if(stored_units + added_units + M.mob_size > storage_capacity)
 			break
 		if(M.client)
 			M.client.perspective = EYE_PERSPECTIVE
 			M.client.eye = src
 		M.forceMove(src)
-		added_units += current_mob_size
+		added_units += M.mob_size
 	return added_units
 
 /obj/structure/closet/proc/toggle(mob/user as mob)
diff --git a/code/game/objects/structures/kitchen_spike.dm b/code/game/objects/structures/kitchen_spike.dm
index e865805991..8596ce037d 100644
--- a/code/game/objects/structures/kitchen_spike.dm
+++ b/code/game/objects/structures/kitchen_spike.dm
@@ -32,7 +32,7 @@
 
 	if(istype(victim, /mob/living/carbon/human))
 		var/mob/living/carbon/human/H = victim
-		if(!H.species.is_small)
+		if(!issmall(H))
 			return 0
 		meat_type = H.species.meat_type
 		icon_state = "spikebloody"
diff --git a/code/game/supplyshuttle.dm b/code/game/supplyshuttle.dm
index 523a83a080..5825c32d48 100644
--- a/code/game/supplyshuttle.dm
+++ b/code/game/supplyshuttle.dm
@@ -70,11 +70,7 @@ var/list/mechtoys = list(
 		for(var/mob_type in mobs_can_pass)
 			if(istype(A, mob_type))
 				return ..()
-		if(istype(A, /mob/living/carbon/human))
-			var/mob/living/carbon/human/H = M
-			if(H.species.is_small)
-				return ..()
-		return 0
+		return issmall(M)
 
 	return ..()
 
diff --git a/code/modules/hydroponics/spreading/spreading_response.dm b/code/modules/hydroponics/spreading/spreading_response.dm
index c9ed2ee79e..2b9407aecd 100644
--- a/code/modules/hydroponics/spreading/spreading_response.dm
+++ b/code/modules/hydroponics/spreading/spreading_response.dm
@@ -7,7 +7,7 @@
 	if(!istype(M))
 		return
 
-	if(!buckled_mob && !M.buckled && !M.anchored && (M.small || prob(round(seed.get_trait(TRAIT_POTENCY)/6))))
+	if(!buckled_mob && !M.buckled && !M.anchored && (issmall(M) || prob(round(seed.get_trait(TRAIT_POTENCY)/6))))
 		//wait a tick for the Entered() proc that called HasProximity() to finish (and thus the moving animation),
 		//so we don't appear to teleport from two tiles away when moving into a turf adjacent to vines.
 		spawn(1)
diff --git a/code/modules/mob/living/carbon/human/human.dm b/code/modules/mob/living/carbon/human/human.dm
index 71e17a3fcf..bcec368d7d 100644
--- a/code/modules/mob/living/carbon/human/human.dm
+++ b/code/modules/mob/living/carbon/human/human.dm
@@ -701,21 +701,21 @@
 /mob/living/carbon/human/proc/headcheck(var/target_zone, var/brain_tag = "brain")
 	if(!species.has_organ[brain_tag])
 		return 0
-	
+
 	var/obj/item/organ/affecting = internal_organs_by_name[brain_tag]
-	
+
 	target_zone = check_zone(target_zone)
 	if(!affecting || affecting.parent_organ != target_zone)
 		return 0
-	
+
 	//if the parent organ is significantly larger than the brain organ, then hitting it is not guaranteed
 	var/obj/item/organ/parent = get_organ(target_zone)
 	if(!parent)
 		return 0
-	
+
 	if(parent.w_class > affecting.w_class + 1)
 		return prob(100 / 2**(parent.w_class - affecting.w_class - 1))
-	
+
 	return 1
 
 /mob/living/carbon/human/IsAdvancedToolUser(var/silent)
diff --git a/code/modules/mob/living/carbon/human/species/species.dm b/code/modules/mob/living/carbon/human/species/species.dm
index 885d045e19..d77493b0b3 100644
--- a/code/modules/mob/living/carbon/human/species/species.dm
+++ b/code/modules/mob/living/carbon/human/species/species.dm
@@ -28,7 +28,7 @@
 	var/tail_hair
 	var/race_key = 0       	                             // Used for mob icon cache string.
 	var/icon/icon_template                               // Used for mob icon generation for non-32x32 species.
-	var/is_small
+	var/mob_size	= MOB_MEDIUM
 	var/show_ssd = "fast asleep"
 	var/virus_immune
 	var/short_sighted
@@ -285,6 +285,7 @@
 	H.mob_swap_flags = swap_flags
 	H.mob_push_flags = push_flags
 	H.pass_flags = pass_flags
+	H.mob_size = mob_size
 
 /datum/species/proc/handle_death(var/mob/living/carbon/human/H) //Handles any species-specific death events (such as dionaea nymph spawns).
 	return
diff --git a/code/modules/mob/living/carbon/human/species/station/monkey.dm b/code/modules/mob/living/carbon/human/species/station/monkey.dm
index 29082cd27c..d9d8347550 100644
--- a/code/modules/mob/living/carbon/human/species/station/monkey.dm
+++ b/code/modules/mob/living/carbon/human/species/station/monkey.dm
@@ -11,7 +11,7 @@
 	language = null
 	default_language = "Chimpanzee"
 	greater_form = "Human"
-	is_small = 1
+	mob_size = MOB_SMALL
 	has_fine_manipulation = 0
 	show_ssd = null
 
diff --git a/code/modules/mob/living/carbon/human/species/station/resomi.dm b/code/modules/mob/living/carbon/human/species/station/resomi.dm
index e8a853c399..238f022aab 100644
--- a/code/modules/mob/living/carbon/human/species/station/resomi.dm
+++ b/code/modules/mob/living/carbon/human/species/station/resomi.dm
@@ -27,7 +27,7 @@
 	total_health = 50
 	brute_mod = 1.35
 	burn_mod =  1.35
-	is_small = 1
+	mob_size = MOB_SMALL
 	holder_type = /obj/item/weapon/holder/human
 	short_sighted = 1
 	gluttonous = 1
diff --git a/code/modules/mob/living/carbon/human/species/station/slime.dm b/code/modules/mob/living/carbon/human/species/station/slime.dm
index bb5b921710..38db954932 100644
--- a/code/modules/mob/living/carbon/human/species/station/slime.dm
+++ b/code/modules/mob/living/carbon/human/species/station/slime.dm
@@ -1,7 +1,7 @@
 /datum/species/slime
 	name = "Slime"
 	name_plural = "slimes"
-	is_small = 1
+	mob_size = MOB_SMALL
 
 	icobase = 'icons/mob/human_races/r_slime.dmi'
 	deform = 'icons/mob/human_races/r_slime.dmi'
diff --git a/code/modules/mob/living/living_defines.dm b/code/modules/mob/living/living_defines.dm
index bc441e665f..5a671afe99 100644
--- a/code/modules/mob/living/living_defines.dm
+++ b/code/modules/mob/living/living_defines.dm
@@ -39,10 +39,7 @@
 	var/tod = null // Time of death
 	var/update_slimes = 1
 	var/silent = null 		// Can't talk. Value goes down every life proc.
-	var/mob_size            // Used by lockers.
 	var/on_fire = 0 //The "Are we on fire?" var
 	var/fire_stacks
 
 	var/failed_last_breath = 0 //This is used to determine if the mob failed a breath. If they did fail a brath, they will attempt to breathe each tick, otherwise just once per 4 ticks.
-
-
diff --git a/code/modules/mob/living/silicon/pai/pai.dm b/code/modules/mob/living/silicon/pai/pai.dm
index 10446ba8fa..cb90cd176b 100644
--- a/code/modules/mob/living/silicon/pai/pai.dm
+++ b/code/modules/mob/living/silicon/pai/pai.dm
@@ -4,8 +4,8 @@
 	icon_state = "repairbot"
 
 	emote_type = 2		// pAIs emotes are heard, not seen, so they can be seen through a container (eg. person)
-	small = 1
 	pass_flags = 1
+	mob_size = MOB_SMALL
 
 	var/network = "SS13"
 	var/obj/machinery/camera/current = null
diff --git a/code/modules/mob/living/silicon/robot/drone/drone.dm b/code/modules/mob/living/silicon/robot/drone/drone.dm
index ee71d225f7..56d608fd65 100644
--- a/code/modules/mob/living/silicon/robot/drone/drone.dm
+++ b/code/modules/mob/living/silicon/robot/drone/drone.dm
@@ -42,6 +42,8 @@ var/list/mob_hat_cache = list()
 	mob_push_flags = SIMPLE_ANIMAL
 	mob_always_swap = 1
 
+	mob_size = MOB_TINY
+
 	//Used for self-mailing.
 	var/mail_destination = ""
 	var/obj/machinery/drone_fabricator/master_fabricator
@@ -68,6 +70,7 @@ var/list/mob_hat_cache = list()
 	can_pull_mobs = 1
 	hat_x_offset = 1
 	hat_y_offset = -12
+	mob_size = MOB_SMALL
 
 /mob/living/silicon/robot/drone/New()
 
diff --git a/code/modules/mob/living/simple_animal/constructs/constructs.dm b/code/modules/mob/living/simple_animal/constructs/constructs.dm
index de7d397f86..f023df1617 100644
--- a/code/modules/mob/living/simple_animal/constructs/constructs.dm
+++ b/code/modules/mob/living/simple_animal/constructs/constructs.dm
@@ -98,7 +98,7 @@
 	melee_damage_lower = 30
 	melee_damage_upper = 30
 	attacktext = "smashed their armoured gauntlet into"
-	mob_size = 20
+	mob_size = MOB_LARGE
 	speed = 3
 	environment_smash = 2
 	attack_sound = 'sound/weapons/heavysmash.ogg'
diff --git a/code/modules/mob/living/simple_animal/friendly/cat.dm b/code/modules/mob/living/simple_animal/friendly/cat.dm
index daf7b3768e..67097c3725 100644
--- a/code/modules/mob/living/simple_animal/friendly/cat.dm
+++ b/code/modules/mob/living/simple_animal/friendly/cat.dm
@@ -23,7 +23,7 @@
 	minbodytemp = 223		//Below -50 Degrees Celcius
 	maxbodytemp = 323	//Above 50 Degrees Celcius
 	holder_type = /obj/item/weapon/holder/cat
-	mob_size = 5
+	mob_size = MOB_SMALL
 
 /mob/living/simple_animal/cat/Life()
 	//MICE!
diff --git a/code/modules/mob/living/simple_animal/friendly/crab.dm b/code/modules/mob/living/simple_animal/friendly/crab.dm
index ed32eec986..5b57bad674 100644
--- a/code/modules/mob/living/simple_animal/friendly/crab.dm
+++ b/code/modules/mob/living/simple_animal/friendly/crab.dm
@@ -5,7 +5,7 @@
 	icon_state = "crab"
 	icon_living = "crab"
 	icon_dead = "crab_dead"
-	small = 1
+	mob_size = MOB_SMALL
 	speak_emote = list("clicks")
 	emote_hear = list("clicks")
 	emote_see = list("clacks")
diff --git a/code/modules/mob/living/simple_animal/friendly/farm_animals.dm b/code/modules/mob/living/simple_animal/friendly/farm_animals.dm
index 60ddd0638b..68578ca08e 100644
--- a/code/modules/mob/living/simple_animal/friendly/farm_animals.dm
+++ b/code/modules/mob/living/simple_animal/friendly/farm_animals.dm
@@ -55,9 +55,9 @@
 
 		if(!pulledby)
 			var/obj/effect/plant/food
-			food = locate(/obj/effect/plant) in oview(5,loc)	
+			food = locate(/obj/effect/plant) in oview(5,loc)
 			if(food)
-				var/step = get_step_to(src, food, 0) 	
+				var/step = get_step_to(src, food, 0)
 				Move(step)
 
 /mob/living/simple_animal/hostile/retaliate/goat/Retaliate()
@@ -167,7 +167,7 @@
 	health = 1
 	var/amount_grown = 0
 	pass_flags = PASSTABLE | PASSGRILLE
-	small = 1
+	mob_size = MOB_MINISCULE
 
 /mob/living/simple_animal/chick/New()
 	..()
@@ -209,7 +209,7 @@ var/global/chicken_count = 0
 	var/eggsleft = 0
 	var/body_color
 	pass_flags = PASSTABLE
-	small = 1
+	mob_size = MOB_SMALL
 
 /mob/living/simple_animal/chicken/New()
 	..()
diff --git a/code/modules/mob/living/simple_animal/friendly/lizard.dm b/code/modules/mob/living/simple_animal/friendly/lizard.dm
index 66fb31406a..fe1ab1dcd0 100644
--- a/code/modules/mob/living/simple_animal/friendly/lizard.dm
+++ b/code/modules/mob/living/simple_animal/friendly/lizard.dm
@@ -5,7 +5,6 @@
 	icon_state = "lizard"
 	icon_living = "lizard"
 	icon_dead = "lizard-dead"
-	small = 1
 	speak_emote = list("hisses")
 	health = 5
 	maxHealth = 5
@@ -15,4 +14,4 @@
 	response_help  = "pets"
 	response_disarm = "shoos"
 	response_harm   = "stomps on"
-	mob_size = 1
+	mob_size = MOB_MINISCULE
diff --git a/code/modules/mob/living/simple_animal/friendly/mouse.dm b/code/modules/mob/living/simple_animal/friendly/mouse.dm
index e0ffc718ff..c102b2062c 100644
--- a/code/modules/mob/living/simple_animal/friendly/mouse.dm
+++ b/code/modules/mob/living/simple_animal/friendly/mouse.dm
@@ -10,7 +10,6 @@
 	emote_hear = list("squeeks","squeaks","squiks")
 	emote_see = list("runs in a circle", "shakes", "scritches at something")
 	pass_flags = PASSTABLE
-	small = 1
 	speak_chance = 1
 	turns_per_move = 5
 	see_in_dark = 6
@@ -29,7 +28,7 @@
 	universal_speak = 0
 	universal_understand = 1
 	holder_type = /obj/item/weapon/holder/mouse
-	mob_size = 1
+	mob_size = MOB_MINISCULE
 
 /mob/living/simple_animal/mouse/Life()
 	..()
diff --git a/code/modules/mob/living/simple_animal/friendly/mushroom.dm b/code/modules/mob/living/simple_animal/friendly/mushroom.dm
index 195cb443bc..4d455e5050 100644
--- a/code/modules/mob/living/simple_animal/friendly/mushroom.dm
+++ b/code/modules/mob/living/simple_animal/friendly/mushroom.dm
@@ -4,7 +4,7 @@
 	icon_state = "mushroom"
 	icon_living = "mushroom"
 	icon_dead = "mushroom_dead"
-	small = 1
+	mob_size = MOB_SMALL
 	speak_chance = 0
 	turns_per_move = 1
 	maxHealth = 5
diff --git a/code/modules/mob/living/simple_animal/friendly/spiderbot.dm b/code/modules/mob/living/simple_animal/friendly/spiderbot.dm
index 53fab43ca6..0c578cee77 100644
--- a/code/modules/mob/living/simple_animal/friendly/spiderbot.dm
+++ b/code/modules/mob/living/simple_animal/friendly/spiderbot.dm
@@ -5,7 +5,7 @@
 	max_co2 = 0
 	minbodytemp = 0
 	maxbodytemp = 500
-	mob_size = 5
+	mob_size = MOB_SMALL
 
 	var/obj/item/device/radio/borg/radio = null
 	var/mob/living/silicon/ai/connected_ai = null
@@ -39,7 +39,6 @@
 	var/obj/item/held_item = null //Storage for single item they can hold.
 	speed = -1                    //Spiderbots gotta go fast.
 	pass_flags = PASSTABLE
-	small = 1
 	speak_emote = list("beeps","clicks","chirps")
 
 /mob/living/simple_animal/spiderbot/New()
@@ -132,7 +131,7 @@
 
 	else
 		attacked_with_item(O, user)
-	
+
 /mob/living/simple_animal/spiderbot/emag_act(var/remaining_charges, var/mob/user)
 	if (emagged)
 		user << "<span class='warning'>[src] is already overloaded - better run.</span>"
diff --git a/code/modules/mob/living/simple_animal/parrot.dm b/code/modules/mob/living/simple_animal/parrot.dm
index a05f394177..658f0f6d4e 100644
--- a/code/modules/mob/living/simple_animal/parrot.dm
+++ b/code/modules/mob/living/simple_animal/parrot.dm
@@ -33,7 +33,7 @@
 	icon_living = "parrot_fly"
 	icon_dead = "parrot_dead"
 	pass_flags = PASSTABLE
-	small = 1
+	mob_size = MOB_SMALL
 
 	speak = list("Hi","Hello!","Cracker?","BAWWWWK george mellons griffing me")
 	speak_emote = list("squawks","says","yells")
diff --git a/code/modules/mob/living/simple_animal/simple_animal.dm b/code/modules/mob/living/simple_animal/simple_animal.dm
index 82cd1683cc..acce1e39b1 100644
--- a/code/modules/mob/living/simple_animal/simple_animal.dm
+++ b/code/modules/mob/living/simple_animal/simple_animal.dm
@@ -285,7 +285,7 @@
 	if(meat_type && (stat == DEAD))	//if the animal has a meat, and if it is dead.
 		if(istype(O, /obj/item/weapon/material/knife) || istype(O, /obj/item/weapon/material/knife/butch))
 			harvest(user)
-	else
+	else
 		attacked_with_item(O, user)
 
 //TODO: refactor mob attackby(), attacked_by(), and friends.
@@ -307,7 +307,7 @@
 		usr << "<span class='danger'>This weapon is ineffective, it does no damage.</span>"
 
 	visible_message("<span class='danger'>\The [src] has been attacked with \the [O] by [user].</span>")
-	user.do_attack_animation(src)
+	user.do_attack_animation(src)
 
 /mob/living/simple_animal/movement_delay()
 	var/tally = 0 //Incase I need to add stuff other than "speed" later
@@ -396,7 +396,7 @@
 		for(var/i=0;i<actual_meat_amount;i++)
 			var/obj/item/meat = new meat_type(get_turf(src))
 			meat.name = "[src.name] [meat.name]"
-		if(small)
+		if(issmall(src))
 			user.visible_message("<span class='danger'>[user] chops up \the [src]!</span>")
 			new/obj/effect/decal/cleanable/blood/splatter(get_turf(src))
 			qdel(src)
diff --git a/code/modules/mob/mob_defines.dm b/code/modules/mob/mob_defines.dm
index c72bb83856..6bbc3aff2e 100644
--- a/code/modules/mob/mob_defines.dm
+++ b/code/modules/mob/mob_defines.dm
@@ -88,7 +88,6 @@
 	var/incorporeal_move = 0 //0 is off, 1 is normal, 2 is for ninjas.
 	var/lastpuke = 0
 	var/unacidable = 0
-	var/small = 0
 	var/list/pinned = list()            // List of things pinning this creature to walls (see living_defense.dm)
 	var/list/embedded = list()          // Embedded items, since simple mobs don't have organs.
 	var/list/languages = list()         // For speaking/listening.
@@ -221,5 +220,4 @@
 	var/list/shouldnt_see = list()	//list of objects that this mob shouldn't see in the stat panel. this silliness is needed because of AI alt+click and cult blood runes
 
 	var/list/active_genes=list()
-
-
+	var/mob_size = MOB_MEDIUM
diff --git a/code/modules/mob/mob_grab_specials.dm b/code/modules/mob/mob_grab_specials.dm
index 4f8bd02a13..cc1a5458c6 100644
--- a/code/modules/mob/mob_grab_specials.dm
+++ b/code/modules/mob/mob_grab_specials.dm
@@ -149,7 +149,7 @@
 		if(istype(H) && H.species.gluttonous)
 			if(H.species.gluttonous == 2)
 				can_eat = 2
-			else if(!ishuman(target) && !issmall(target) && (target.small || iscarbon(target)))
+			else if((H.mob_size > target.mob_size) && !ishuman(target) && iscarbon(target))
 				can_eat = 1
 
 	if(can_eat)
diff --git a/code/modules/mob/mob_helpers.dm b/code/modules/mob/mob_helpers.dm
index 1fadadf64f..f6734b0084 100644
--- a/code/modules/mob/mob_helpers.dm
+++ b/code/modules/mob/mob_helpers.dm
@@ -6,10 +6,9 @@
 	return 0
 
 /proc/issmall(A)
-	if(A && istype(A, /mob/living/carbon/human))
-		var/mob/living/carbon/human/H = A
-		if(H.species && H.species.is_small)
-			return 1
+	if(A && istype(A, /mob/living))
+		var/mob/living/L = A
+		return L.mob_size <= MOB_SMALL
 	return 0
 
 /mob/living/proc/isSynthetic()