The complete illustrated periodic table of the elements, now in a fun and colorful puzzle format! Features: 1,000 pieces, Dimension: 19.25 x 26.5 inches, Superior-quality piece by piece, Perfect and easy-fit puzzle pieces, Strong high-quality unbreakable puzzle pieces, Made from recycled board, Image printed on recycled paper. Ink is vegetable based. This superior quality puzzle will delight and educate all at the same time.