More product information : The completed puzzle measures 276 x 192cm when complete, so whoever buys this will need lots of space to build it in! The 18,000 pieces come supplied in 4 different bags, so you can complete one section at a time. A really good gift to keep jigsaw enthusiasts happy! Ravensburger adult puzzles are made using Softclick Premium Puzzle technology. This uses thicker and stronger board (manufactured especially for Ravensburger), and hand-crafted cutting tools resulting in strong, smooth and dust-free pieces with a superb fit.