diff --git a/code/modules/mob/mob_grab.dm b/code/modules/mob/mob_grab.dm
index cb7146af27e..e34890d1cdb 100644
--- a/code/modules/mob/mob_grab.dm
+++ b/code/modules/mob/mob_grab.dm
@@ -136,7 +136,7 @@
 			handle_eye_mouth_covering(affecting, assailant, assailant.zone_sel.selecting)
 
 		if(force_down)
-			if(affecting.loc != assailant.loc)
+			if(affecting.loc != assailant.loc || size_difference(affecting, assailant) > 0)
 				force_down = 0
 			else
 				affecting.Weaken(2)
@@ -237,7 +237,7 @@
 	if(state < GRAB_AGGRESSIVE)
 		if(!allow_upgrade)
 			return
-		if(!affecting.lying)
+		if(!affecting.lying || size_difference(affecting, assailant) > 0)
 			assailant.visible_message("<span class='warning'>[assailant] has grabbed [affecting] aggressively (now hands)!</span>")
 		else
 			assailant.visible_message("<span class='warning'>[assailant] pins [affecting] down to the ground (now hands)!</span>")
diff --git a/code/modules/mob/mob_grab_specials.dm b/code/modules/mob/mob_grab_specials.dm
index af50746cd4d..e7b75a2e5de 100644
--- a/code/modules/mob/mob_grab_specials.dm
+++ b/code/modules/mob/mob_grab_specials.dm
@@ -131,6 +131,10 @@
 		return
 	if(force_down)
 		attacker << "<span class='warning'>You are already pinning [target] to the ground.</span>"
+		return
+	if(size_difference(affecting, assailant) > 0)
+		attacker << "<span class='warning'>You are too small to do that!</span>"
+		return
 
 	attacker.visible_message("<span class='danger'>[attacker] starts forcing [target] to the ground!</span>")
 	if(do_after(attacker, 20) && target)