Part Number: 135.269 Made Ring Finger Gauges. These sizers are made of hi-impact durable plastic and are colored coded for quick reference. (1 thru 15) and diameter in mm (13 thru 24.2 mm) on one side, and French sizes (1 thru 36) and circumference (41 thru 76 mm) on the other side. You get 36 individual ring sizes instead of the usual 30. The extra sizes are sizes in 3, 5, 7, 8, 10, 12 & 13. Premium quality.