Scrapbook Adhesives: Black 3D Foam Squares: Two Size Package. Is your paper craft project looking a little flat? Try these wonderful foam squares. Features: add dimension, great for layering, high density, acid free, archival safe, permanent, acrylic based, lignin free, PAT tested and approved. This package contains (63) 1/2x1/2x1/16in and (154) 1/4x1/4x1/16in squares.