A beautifully rendered map of the constellations. 1500 piece Ravensburger jigsaw puzzles for adults are crafted with premium quality, in terms of both content and material, and have a completed size of 31. 5" x 23. 5". Anti-Glare surface - Ravensburger puzzles use an exclusively developed, extra-thick cardboard combined with fine, linen structured paper to create a glare-free puzzle image and give you the best experience possible. Every piece is unique – None of the frustrations you might find with some other puzzle brands. With Ravensburger, every individual piece has a completely unique shape. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.