Unit blocks are still the most fundamental of all play materials. All Whitney blocks are carefully made from selected hardwood which is precisely machined. Then the edges are hand-smoothed and sanded. They are based on a 1-3/8" x 2-3/4" x 5-1/2" module and are available in 29 different shapes in six assortments for home or school use. Beginner Block Set contains: 75 pieces in 16 shapes. Made in USA by Whitney Brothers