Hygloss's Compoz-A-Puzzle line features all of your blank jigsaw puzzle needs in one convenient place. With different quantity packs, with and without envelopes, and from postcard-to-poster sizes available, Compoz-A-Puzzle is the ultimate destination for your puzzle-themed art projects, events, classrooms and more. These puzzles are made of heavy weight cardboard, glossy white on front and matte white on reverse side.