This set includes 7 or 11 Tumi Ishi (wooden rock/ stone) blocks. (Choose quantity at checkout) Each block is handmade from naturally fallen hardwood branches. The blocks have been naturally seasoned, hand-sanded, and sealed with an all-natural beeswax finish. The vibrant colors are the natural wood grain, NO paints, dyes or stains are used. Every block is unique, no two sets are the same! challenging stacking blocks are a great gift for children of all ages, siblings, adults, or even as a decoration! The blocks can be stacked in many different ways, making them a great toy to play quietly on your own, or as a fun competition with family and friends;who can stack the most!? block measures approximately 1.5”-4”. The blocks are very durable and can be hand washed with soap and warm water, let air dry completely. Never store blocks in an airtight container as they are made from natural wood. Each set includes a variety of wood types such as Red Cedar, Pecan, Osage Orange, Sycamore, Maple, Oak, Pear, Walnut, Madrone, and more! the blocks are made from naturally fallen branches, there will be variations and dimensions are approximate.