International ring-size conversion chart

Inside DiameterUK, Australia, Ireland, New Zealand, South AfricaUS, Canada, MexicoItaly, Spain, Netherlands, SwitzerlandIndia, China, Japan, South America, Turkey, IsraelFranceGermany, Russia, Ukraine, Asia
14 mmF2 3/44.044414
14.2 mmF 1/234.6-45-
14.4 mmG3 1/45.35.54514.5
14.6 mmG 1/23 2/45.9-4614.5
14.8 mmH3 3/46.5747-
15 mmH 1/247.1-4715
15.2 mmI4 1/47.8848-
15.4 mmI 1/24 2/48.4-4815.5
15.6 mmJ4 3/49.094915.5
15.8 mmJ 1/259.6-50-
16 mmK5 1/410.310.55016
16.2 mmK 1/25 2/410.9-51-
16.4 mmL5 3/411.5125216.5
16.6 mmL 1/2612.1-5216.5
16.8 mmM6 1/412.81353-
17 mmM 1/26 2/413.4-5317
17.2 mmN6 3/414.014.2554-
17.4 mmN 1/2714.6-5517.5
17.6 mmO7 1/415.315.55517.5
17.8 mmO 1/27 2/415.9-56-
18 mmP7 3/416.5175718
18.2 mmP 1/2817.1-57-
18.4 mmQ8 1/417.8185818.5
18.6 mmQ 1/28 2/418.4-5818.5
18.8 mmR8 3/419.019.2559-
19 mmR 1/2919.6-6019
19.2 mmS9 1/420.320.560-
19.4 mmS 1/29 2/420.9-6119.5
19.6 mmT9 3/421.3226219.5
19.8 mmT 1/21022.1-62-
20 mmU10 1/422.8236320
20.2 mmU 1/210 2/423.4-63-
20.4 mmV10 3/424.024.256420.5
20.6 mmV 1/21124.6-6520.5
20.8 mmW11 1/425.325.565-
21 mmW 1/211 2/425.9-6621
21.2 mmX11 3/426.526.7567-
21.4 mmX 1/21227.1-6721.5
21.6 mmY12 1/427.8286821.5
21.8 mmY 1/212 2/428.4-68-
22 mmZ12 3/429.0-6922
22.2 mmZ + 1/213--70-
22.4 mmZ + 113 1/4--7022.5
22.6 mmZ + 1 1/213 2/4--7122.5
22.8 mmZ + 213 3/4--72-
23 mmZ + 2 1/214--7223
23.2 mmZ + 314 1/4--73-
23.4 mmZ + 3 1/214 2/4--7323.5
23.6 mmZ + 414 3/4--7423.5
23.8 mmZ + 4 1/215--75-
24 mmZ + 515 1/4--7524
24.2 mmZ + 5 1/215 2/4--76-

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