These MasterPieces 11.25" x 16.75" World's Smallest 1000pc Puzzles are designed for both entertainment and ergonomics. Sold in a compact 4" x 8" collectible tin box, these puzzles will fit anywhere, and feature beautiful paintings and photography from some of the world's most talented artists. All my marbles features marbles of all sizes and colors. To reduce their impact on our environment, the chipboard used in these puzzles is made of recycled material.