Sunday - EZThin Stamping System - Sheets for Stamps That Already have had Foam on them 8.5"X11" Allows you to make any rubber stamp into an EZMount stamp that clings perfectly to an acrylic block. No sticky mess and never wears out. It is not recommended you store any of your EZMount stamps on acetate sheets. Acetate is made with chemicals that react with EZMount and other cling cushion type product, making it almost a permanent bond between it and the cling.