[About This 631pc Puzzle] A challenge for true puzzle lovers, introducing the "Gradient Krypt"! [Bestselling Puzzle Brand Worldwide] Ravensburger has sold over 1 billion jigsaw puzzles for adults and kids! [Premium Puzzling Experience] The ultimate challenge for puzzle enthusiasts! No image to puzzle. The secret is in the puzzle cut pattern—unusal shapes set in a spiral design. No two pieces are alike. [Sturdy, Vibrant and Glare Free] Long-lasting quality materials for years of puzzling enjoyment. Clean-cut pieces with matte finish and Ravensburger’s perfect interlocking fit. [Positive Benefits] Great as a gift, to enjoy with others, or for some relaxing "me" time. Create memorable moments with Ravensburger premium puzzles!