Bestselling puzzle brand worldwide - With over 1 billion puzzles sold, Ravensburger is the bestselling puzzle brand worldwide. 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. None of the frustrations you find with other puzzle brands. With Ravensburger, every individual piece has a completely unique shape.