Melissa & Doug Scratch Art 3D-O's Adhesive Foam Mounts, 400-Pack Description - 3D-O's Double-Sided Adhesive Foam Mounts Size - Round 1/2" diameter x 1/4" thick die-cut circles Quantity/Unit - 400 circles per pack Special Features/Suggested Use - Acid-free, create 3D pictures, posters, displays Includes - Instructions