IDM Clear Adhesive CR-80 Card Overlays - Pack of 100 This self-adhesive protection cover will provide additional protection for your plastic cards. They are an easy and cost-effective way of protecting your cards. Line up the overlay with your card and lay it across; swift and easy. They are CR-80 size, measuring 86.5mm x 54mm, and just 0.09mm thick (90 micron), these overlays are a great way to instantly protect your ID cards and offers the thinnest, almost invisible layer of defence.