?27 depressions on one side. Sizes increases as follows: 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 13/32″, 5/8″, 11/16″, 3/4″, 13/16″ , 7/8″, 15/16″ and 1″. The block measures 51/8″ L x 21/2″ W x 3/4″ D.
