diff --git a/script/setup/Layout.py b/script/setup/Layout.py
index eba507e..e64c361 100644
--- a/script/setup/Layout.py
+++ b/script/setup/Layout.py
@@ -1,5 +1,6 @@
 BLOCK_ROI_TOLERANCE = 10 #mm
 LED_TOLERANCE = 8 #mm Distance between LEDs = 18mm
+PUCK_SIZE = 65
 
 puck_layout = (
     #Num  Elm    A0 Index A1       Uni      Mini     Center   Angle    Xuni     Yuni      Xmini=Xc  Ymini==Yc