This 16-piece set is sized to standard unit block construction. Beautifully constructed with birch plywood and solids, with no exposed screws or hardware. Edges are rounded and surfaces are sanded smooth for safety, and hours of creative play. Largest block: 11"W x 5-1/2"D x 2-3/4"H. Smallest block: 5-1/2"W x 2-3/4"D x 1-1/4"H. Ages 3+.