diff --git a/modular_skyrat/modules/customization/modules/surgery/organs/genitals.dm b/modular_skyrat/modules/customization/modules/surgery/organs/genitals.dm
index efbdedfc3fd..29383096b36 100644
--- a/modular_skyrat/modules/customization/modules/surgery/organs/genitals.dm
+++ b/modular_skyrat/modules/customization/modules/surgery/organs/genitals.dm
@@ -521,6 +521,8 @@
 	var/max_size = 5
 	if(genital_type == "pair")
 		max_size = findtext(genital_name, "(Alt)") ? 19 : 16
+	if(genital_type == "quad")
+		max_size = findtext(genital_name, "(Alt)") ? 19 : 5
 	var/current_size = FLOOR(genital_size, 1)
 	if(current_size < 0)
 		current_size = 0