Assemble your puzzle on the soft felt surface that makes it easy to sort and pick up pieces. Then simply fold the sides together to transport or store your puzzle until next time. For use on all puzzles up to 1,000 pieces. Assemble in the middle section and sort on the sides. Felt and polyester; imported. Puzzle assembly area is 32″ x 21 3/4″. Folded dimensions are 32″ x 23″; open is 64″ x 23″.