diff --git a/code/game/machinery/vending.dm b/code/game/machinery/vending.dm
index 1ac341db260..8e87506803b 100644
--- a/code/game/machinery/vending.dm
+++ b/code/game/machinery/vending.dm
@@ -447,7 +447,7 @@
 /obj/machinery/vending/tgui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = TRUE, datum/tgui/master_ui = null, datum/tgui_state/state = GLOB.tgui_default_state)
 	ui = SStgui.try_update_ui(user, src, ui_key, ui, force_open)
 	if(!ui)
-		var/estimated_height = 100 + (length(product_records) * 34)
+		var/estimated_height = 100 + min(length(product_records) * 34, 500)
 		if(length(prices) > 0)
 			estimated_height += 100 // to account for the "current user" interface
 		ui = new(user, src, ui_key, "Vending",  name, 470, estimated_height, master_ui, state)