This 500 pc round puzzle has a finished size of 20.5"in diameter. Ravensburger makes the world's highest quality puzzles! All Ravensburger puzzles are made from the highest quality and thickest green Kappa cardboard available. We use the finest structured paper so the pieces last and have an attractive matte finish which makes them easy to see and handle. Our puzzles are cut with hand made dies to ensure that all pieces are fully interlocking.