200 Round Self Adhesive Magnetic Circles .5" Diameter 4 mil Magnets Arts and Crafts School Magnet Dot Tape New Cute Self-adhesive Roll Craft Light duty flexible style magnet formula. Good for holding paper onto file cabinets or refrigerators. These inexpensive disc magnets are great for many craft uses. Size is about 1/2" diameter x a very slim 1/32" thick. 200 pieces for one low price!