The Muscular System jigsaw puzzle, 1,000 pieces. Learn about the muscles of the human body. Features details of the head, the neck and the hand. 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.