Ravensburger is the worlds most popular puzzle brand 2 500 piece puzzles included ages 10 features a magnificent view of the river thames london windsors castle and all saints church high quality 2 x 500 piece cardboard jigsaw puzzle the finished puzzle measures 49 x 36 cm when complete suitable for ages 10 years and up made from strong premium grade cardboard with linen finish print to minimise glare on puzzle image