diff --git a/case/top.scad b/case/top.scad
index a64e49d..cac8696 100644
--- a/case/top.scad
+++ b/case/top.scad
@@ -11,7 +11,9 @@ $fn = 72;
  * Vertical ridge interval: 31.3mm
  * Ridge thickness: 1.25mm
  * First horizontal ridge: Starts at keyboard X offset
- * First vertical ridge: 8mm
+ * Ridge height: 11.5mm
+ * Ridge upper aspect: 8mm
+ * First vertical ridge Y offset: 8mm
  */
 
 key_switch_height = 11.10;