Since 1891 we"ve been making the finest puzzles and it"s our attention to detail which makes Ravensburger the world"s greatest puzzle brand! We use an exclusively developed extra-thick cardboard and combine this with our fine linen-structured paper to create a glare-free puzzle image. Our cutting tools are designed and crafted by hand. This ensures that no two pieces are alike and guarantees a perfect interlocking fit. Experience the quality!