This set of 4 stacking puzzles are the perfect little conversation piece for your coffee table. Each puzzle stacks on the next with an interlocking system, so they won't slide off. Each puzzle has 21-23 pieces, but don't let that fool you, they are still a bit tricky! Adults and kids will both have fun putting these back together. Stores easily in a stack. Measures 6x6x1.75" when stacked together. Comes unfinished. Add your own paint or stain or leave it the natural beautiful birch wood. All pieces are cut on with a laser using birch plywood. Wood may have slight imperfections, as it is a natural product. Made in the USA in our home based shop. Thanks for supporting our small handmade business!