Thicker for more dimension! These 3mm sticky foam strips can be cut to the desired length. Build your Paper Tole designs quickly with these foam strips. Insert the foam between the layers on your paper tole design—they're sticky on both sides to make it easy to add and position them. These squares allow you to build your layers very easily. Foam Strips 3-D Pads 33 WHITE 3mm deep x 9mm wide x 3.75inches long Double-Sided Adhesive Darice.