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 our fine, linen structured paper to create a glare-free puzzle image and give you the best experience possible.