WARNING: Small parts. Not for children under 3 yrs. Fits for most ages(8+) and skill levels. The rear side is numbered from A-F for handy reference. So you can know what the completed puzzle should look like when you put yours together. Product Parameters Material: thickened cardboard Target users: 8 yrs + Finished 31.5 x 23.6 inches 1500 Piece jigsaw puzzles for adults. (The frame is not included) Leonardo Da Vinci La Scapigliata Jigsaw Puzzle 1500pcs Puzzle Finished size is 31.5 x 23.6 inches. 1500 piece puzzles Made from recycled cardboard. Bringing friends and families together and providing hours of fun and entertainment.