diff --git a/code/__HELPERS/sanitize_values.dm b/code/__HELPERS/sanitize_values.dm
index faa8c22f38..e494468fe7 100644
--- a/code/__HELPERS/sanitize_values.dm
+++ b/code/__HELPERS/sanitize_values.dm
@@ -6,6 +6,13 @@
 			return number
 	return default
 
+/proc/sanitize_num_clamp(number, min=0, max=1, default=0, quantize=0)
+	if(!isnum(number))
+		return default
+	. = CLAMP(number, min, max)
+	if(quantize)
+		. = round(number, quantize)
+
 /proc/sanitize_text(text, default="")
 	if(istext(text))
 		return text
diff --git a/code/controllers/configuration/entries/game_options.dm b/code/controllers/configuration/entries/game_options.dm
index cb18d37f21..60eda61802 100644
--- a/code/controllers/configuration/entries/game_options.dm
+++ b/code/controllers/configuration/entries/game_options.dm
@@ -455,10 +455,12 @@
 	config_entry_value = RESIZE_DEFAULT_SIZE
 	min_val = 0.1 //to avoid issues with zeros and negative values.
 	max_val = RESIZE_DEFAULT_SIZE
+	integer = FALSE
 
 /datum/config_entry/number/body_size_max
 	config_entry_value = RESIZE_DEFAULT_SIZE
 	min_val = RESIZE_DEFAULT_SIZE
+	integer = FALSE
 
 //Pun-Pun movement slowdown given to characters with a body size smaller than this value,
 //to compensate for their smaller hitbox.
@@ -467,12 +469,14 @@
 	config_entry_value = RESIZE_DEFAULT_SIZE * 0.85
 	min_val = 0
 	max_val = RESIZE_DEFAULT_SIZE
+	integer = FALSE
 
 //multiplicative slowdown multiplier. See 'dna.update_body_size' for the operation.
 //doesn't apply to floating or crawling mobs
 /datum/config_entry/number/body_size_slowdown_multiplier
 	config_entry_value = 0.25
 	min_val = 0.1 //To encourage folks to disable the slowdown through the above config instead.
+	integer = FALSE
 
 //Allows players to set a hexadecimal color of their choice as skin tone, on top of the standard ones.
 /datum/config_entry/number/allow_custom_skintones
diff --git a/code/modules/client/preferences_savefile.dm b/code/modules/client/preferences_savefile.dm
index a64d3e057d..4bf55c9837 100644
--- a/code/modules/client/preferences_savefile.dm
+++ b/code/modules/client/preferences_savefile.dm
@@ -599,7 +599,7 @@ SAVEFILE UPDATING/VERSIONING - 'Simplified', or rather, more coder-friendly ~Car
 	var/static/size_max
 	if(!size_max)
 		size_max = CONFIG_GET(number/body_size_max)
-	features["body_size"]			= sanitize_integer(features["body_size"], size_min, size_max, RESIZE_DEFAULT_SIZE)
+	features["body_size"]			= sanitize_num_clamp(features["body_size"], size_min, size_max, RESIZE_DEFAULT_SIZE, 0.01)
 
 	var/static/list/B_sizes
 	if(!B_sizes)