Set includes: . 2 Full units. 2 Half-wide units. 4 Square units. 6 Half squares. 1 Full ramp. 1 Half-wide ramp. 2 Flat boards . Edges are rounded and sanded to be splinter-free. All joints are glued and reinforced. Non-toxic. Safety tested - CPSIA compliant. For ages 2 and up with adult supervision recommended. Basic unit: 7.8 in. L x 3.9 in. W x 3.9 in. H. An assortment of over-sized, chunky blocks are perfect for little architects! Set of 18 hollow blocks in a variety of shapes, made of fine hardwood with a smooth natural finish. Based on a unit measurement of 3.9 in. giving uniformity of measure for easy building. Features rounded edges for safety. 18 pieces of hollow wooden blocks Rounded edges and smooth finish for safety Durable hardwood construction Basic unit measures: 7.8 Inch wide by 3.9 Inch deep by 3.9 Inch high