Revolver Ring SizerClean, strong and easy. Will not brake in your pocket and all numbers are readable. With the special shaping of each cylinder it's great for testing thick or thin ring. It's important if a thick ring is disturbing when you form a fist with your hand.
Available sizes and links
Small
5,5 (16,1mm - K 1/2),
6 (16,51mm - L 1/2),
6,5 (16,9mm - M 1/2),
7 (17,35mm - N 1/2),
7,5 (17,63mm - O 1/2),
8 (18,19 mm - P 1/2)
Medium
8,5 (18,59 mm - Q 1/2),
9 (18,9 mm - R 1/2),
9,5 (19,4mm S 1/2),
10 (19,8 mm - T 1/2),
10,5 (20,2 mm - U 1/2),
11 (20,6 mm - V 1/2)
Large11,5 (21 mm - W 1/2),
12 (21,4 mm - X 1/2),
12,5 (21,8 mm - Z),
13 (22,2 mm),
13,5 (22,6 mm),
14 (23mm - Z3)