Inexpensive sizer is an ideal give away to customers. After the sale, the jeweler can remove the correct ring size from the plastic form and send it to the manufacturer with an order as an exact template. Eliminates resizing problems caused by inaccurate ring sticks. Contains 23 sizes, from 2-1/2 to 14, graduated in half sizes by US standards. Sold & priced by the dozen. Dimensions of each flat: 4 3/8" x 7-1/2".