Show your true colors and conquer the challenge of our Krypt Gradient puzzle!Its color on a curve, and sure to be an interesting challenge! Part of our popular series, Krypt Gradient will test your color perception the ability to distinguish between different hues. Each of the 631 pieces has been created by a hand-crafted, spiral-inspired cutter, resulting in unique cuts with many odd shapes. Without a traditional illustration and only subtle gradient transitions for direction, patience and focus are essential. Assemble this puzzle for many shades of colorful fun!This 631-piece jigsaw puzzle combines soothing gradient colors with clean-cut pieces and Ravensburgers perfect interlocking fit for a most pleasurable puzzling experience! Our puzzles are crafted with an exclusive, extra-thick cardboard backing along with our superior, linen-structured paper, so the printed image is vibrant, crisp, and glare-free. Create memorable moments with Ravensburger premium puzzles!Fun for ages 14 and up! Measures approximately 70 x 50 cm (27 x 19.5 inches) when completed.