EuroGraphics The Jack Pine by Tom Thomson 1000-Piece Puzzle. Box size: 10" x 14" x 2.37". Finished Puzzle Size: 19.25" x 26.5". Although not a member, Tom Thomson directly influenced a group of painters that would come to be known as the Group Of Seven. Strong high-quality puzzle pieces. Made from recycled board and printed with vegetable based ink. This superior quality puzzle will delight and educate all at the same time.