They are made of a sturdy paper material. Blank jigsaw puzzle is a fun way to create your own personalized puzzle. It is for weddings, showers, birthdays, invitations, and classroom or home activities. Decorating these puzzles is so much fun. You can decorate yours and with a friend to see if they can solve your puzzle. Make it as challenging or easy as you desire. Features - Color: White. - Material: Paper. - Size: About 20 x 0.5 cm. - The puzzle is made by durable and practical paper material. - Coming up with your idea on how to decorate this puzzle is half the fun. Decorate with crayons, markers, pencils, rubber stamps, paint and much more! - The puzzles come preassembled and stay together until taken apart. They will not break off while you design it. - for weddings, showers, birthdays, invitations, and classroom or home activities. - Warm Tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 15 x blank puzzles