1. Product size:80 and 300 pieces: 26.5X38.5CM500 pieces: 52.5X38.5CM1000 pieces: 75.5X50.5CM1500 pieces: 87.5X57.5CM2. Do not leave it in a humid place for a long time, it is recommended to buy a puzzle frame and hang it.3. The advantages of the puzzle: exercise the thinking ability and hands-on ability of the space, maintain the patient's endurance, success and surprise.4. Jigsaw toys are made of non-toxic and odorless materials, which are strong and sturdy, will not cause tears to children, and the stamped parts are smooth and easy to assemble5. Jigsaw puzzles can help children focus and stimulate the brain's thinking skills, and also help improve spatial imagination, patience and analysis☟Notes:-Manual measurement may produce an error of 1-2 cm, please understand. Due to different monitor settings, color deviation may vary.-We provide you with the best products and services. If you have any questions, please contact us via email and let us know. We will resolve the issue as soon as possible. thank you very much.