DIY Sublimation Blank Puzzles make your life full of fun.Material: cardboard materialSize:7.095.12inches/1813cmPackage includes: 8 Sets of blank puzzlesWarm notes:The recommended temperature is 360-380F, using a hot press for 30-50 seconds under heavy press.In order to make the puzzle cleaner, please avoid using blurry or out of focus images (the photo should be over 2000 pixels as much as possible)