International Ring Sizes

The German ring size is the numeric value of the inside diameter. This system is also popular in East European countries and Russia.

 

The French decided to use the circumference instead of the diameter just to stick it to the Krauts. Much like the idea of driving a car on the opposite side of the road, the British letter-based ring sizes make no sense to anyone outside the UK, Ireland, Australia, and New Zealand.

 

The Swiss system is often called the European system. Swiss ring sizes are simply the circumference minus 40. Swiss ring sizes are used in Italy, Spain, Israel, the Netherlands, and a bunch of other countries that do not speak English, yet hate the French as much as the British do.

 

There is no point of reference for the US system either. Still, since Americans are buying the bulk of rings produced worldwide, the US system is well understood and accepted. It is the standard system in the US, Canada, and Mexico. The size is calculated by deducting 11.54 from the diameter and dividing the result by 0.83. Asian ring sizes use numeric values between 1 and 34 without the nonsense of half- or quarter-size increments. Chinese, Japanese, and other Asian systems differ from each other.

 

Most Asian ring size charts on the web are notoriously imprecise because wrong data is constantly copied from one website to another. We have the most accurate and up-to-date chart and gladly share it here with you.

 

The main Asian systems are Chinese, Japanese, Hong Kong, and Taiwan.  The Chinese claim that the Japanese stole their system. Japanese say the Chinese took their system. Altogether, they blame Koreans.

 

The Japanese system is straightforward, the sizes are 0.3 mm of the diameter apart.  Each size is calculated by deducting 12.67 from the diameter and multiplying the result by 3.

 

The Hong Kong system is slightly different from the Japanese and Chinese systems, and we don't know why.

 

However, Polish ring sizes 15 to 20 are exactly the same as Hong Kong's. But sizes smaller than 15 and larger than 20 are mysteriously out of synch. Then again, they pack a garden hose in a 50-foot long box in Poland.

  • Sizes 1-3 Tiny! Before proposing, check her ID. It might be illegal 
  • Sizes 3-4 US Petite, normal in Asia
  • Sizes 4-5 Average size in Asia, petite in the US
  • Size 5 Standard stock size in Asia
  • Sizes 5-6 Most common range of sizes. If unsure, go with 5 1/2
  • Size 6 - Stock size in the US.
  • Sizes 6-7 Full size.
  • Sizes 7-8 Large size
  • Sizes 8-9 Plus-size
  • Sizes 9 and above are typically men's sizes or an arthritic knuckle.

Only a professional knows how to measure finger size accurately and precisely. In addition, the fit varies for different ring styles, widths, and measuring sets. Personal preferences for tighter or looser fit are also a consideration.

We do not measure the comfort with which the ring sits on the finger. Instead, we measure how easy the ring slides past the widest part of a finger - the knuckle.

 

flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
CircumferenceDiameterUSFrançaisUKSvizraChina日本語 JapanHong KongTaiwanDeutscheCaspierPolish
31.1309.90000
33.6210.700
35.5011.3
35.8111.4
36.1311.5
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
36.4411.60
36.7611.7
37.0711.8
37.3811.9
37.7012.01/2A 12
38.0112.1
38.3312.23/4A 1/2 12 1/4
38.6412.3
38.9612.47/8
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
39.2712.51B12 1/2
39.5812.6 1 1/8B 1/4
39.9012.71 1/440B 1/212 3/41
40.2112.81 1/2B3/4
40.5312.91 5/8C 0.5 13
40.8413.01 3/4 41C1/4 2
41.1513.11 7/8C1/2 115.9
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
41.4713.22C 3/41.513 1/4
41.7813.32 1/842D 1.75 3
42.1013.42 1/4D 1/4 26.4
42.4113.52 3/8D 1/22.25 13 1/2
42.7313.62 1/2D 3/42.75
43.0413.72 5/843E 3 13 3/44
43.3513.82 3/4E 1/4 33557
43.6713.92 7/8E 1/23.5
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
43.9814.0344E 3/4 4 14 5
44.3014.1F 4.2544667.5
44.6114.23 1/8F 1/414 1/4
44.9214.33 1/445F 1/24.756
45.2414.43 3/845 1/4F 3/4 5.5 5 8.1
45.5514.53 1/245 1/2G5.576.514 1/2
45.8714.63 5/845 3/4G 1/4
46.1814.73 3/446G 1/26 614 3/48.67
46.5014.83 7/8G 3/4 6.58 7.5
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
46.8114.94H6.75
47.1215.04 1/847H 1/477 15 9.2 8
47.4415.14 1/4H 1/28.5
47.7515.24 3/8H 3/4 8 98.25
48.0715.34 1/248I8 815 1/4 9.7 9
48.3815.44 5/8I 1/4
48.6915.54 3/4I 1/28.759 108.75 15 1/2
49.0115.64 7/849I 3/49 10.3
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
49.3215.75J9.2515 3/410
49.6415.85 1/8J 1/2
49.9515.95 1/450J 3/410 10 1011 9.2510.8
50.2716.05 3/8K 16 11
50.5816.1 5 1/2K 1/210.5
50.8916.25 5/851K 3/411 1112 10.25 11.3
51.2116.35 3/4L 11.25 16 1/412
51.5216.45 7/8L 1/4
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
51.8416.5652L 1/211.751216 1/211.9
52.1516.66 1/8L 3/4 12 1311
52.4616.76 1/4M12.5 16 3/413
52.7816.86 3/853M 1/4
53.0916.96 1/2M 1/213.2513 1314 11.75 12.5
53.4117.06 3/4M 3/41714
53.7217.16 5/854N13.75
54.0417.26 7/8N 1/4 1413
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
54.3517.37N 1/214.5141512.517 1/415
54.6617.47 1/8N 3/4
54.9817.57 1/455O 15 17 1/2
55.2917.67 3/8O 1/415 13.6
55.6117.77 1/2O 1/2 15.7515.516 13.25 17 3/416
55.9217.87 5/856O 3/4
56.2317.97 3/4P 16.251614.1
56.5518.07 7/8P 1/416.517 14 1817
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
56.8618.18P 1/217
57.1818.28 1/857P 3/4 17 18 1/414.7
57.4918.38 1/4Q 17.51814.518
57.8118.48 3/858Q 1/4
58.1218.58 1/2Q 1/218.25 18 18 1/2 15.2
58.4318.68 5/8
58.7518.78 3/459Q 3/41919 19 15.25 19
59.0618.88 7/8R 19 18 3/4 15.8
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
59.3818.99R 1/419.5
59.6919.060R 1/2 20 2016 1920
60.0019.19 1/8R 3/4 20.2520 16.3
60.3219.29 1/4S 19 1/4
60.6319.39 3/8S 1/420.75 21
60.9519.49 1/261S 1/2 21 2116.5
61.2619.59 5/8S 3/4 21 19 1/2 16.9
61.5819.69 3/4T 21.5
61.8919.79 7/8T 1/4 22 2217.25 22
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
62.2019.81062T1/2222219 3/417.4
62.5219.910 1/8T 3/4
62.8320.010 1/4U 22.75 20 23
63.1520.110 3/863U 1/423 23 23 18 18
63.4620.210 1/2U 1/2 23.25 20 1/4
63.7720.310 5/8U 3/4 24
64.0920.410 3/464V2424 242418.5 18.5
64.4020.510 7/8V 1/4 20 1/2
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
64.7220.611V 1/224.75
65.0320.711 1/865V 3/4 25 1925
65.3520.811 1/4W 25.25 25 2519.2520 3/4
65.6620.911 3/8W 1/4
65.9721.011 1/266W 1/226 2126
66.2921.111 5/8W 3/4 2626262019.6
66.6021.211 3/4X 26.521 1/4
66.9221.311 7/867X 1/427
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
67.2321.412X 1/227.252720.2
67.5421.512 1/8X 3/427.527.527 20.75 21 1/2
67.8621.612 1/4Y 27.75
68.1721.712 3/868Y 1/228 20.728
68.4921.812 1/2Z 28.5 28.5 28 21.25 21 3/4
68.8021.912 5/8Z 1/4
69.1222.012 3/469Z 1/229292221.329
69.4322.112 7/8
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
69.7422.21329.7530292222 1/4
70.0622.313 1/8703021.8 30
70.3722.413 1/4Z+130.5
70.6922.513 3/8 3130 23 22 1/2
71.0022.6 13 1/271Z+1.5 31 3122.3
71.3122.713 5/831
71.6322.813 3/4Z+2 31.75 22 3/4
71.9422.913 7/8Z+2.5
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
72.2623.014Z+332.25322322.932
72.5723.114 1/8
72.8823.214 1/4Z+3.53323 1/4
73.2023.314 3/8 33 23.5 33
73.5123.414 1/2Z+433.5
73.8323.514 5/823 1/2
74.1423.614 3/4Z+4.534.25 34 24
74.4623.714 7/8
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
74.7723.81524.7523 3/4
75.0823.915 1/8Z+5
75.4024.015 1/4 35.524
75.7124.115 3/8
76.0324.215 1/236.2524 1/4
76.3424.315 5/8Z+6
76.6524.415 3/4 36.75
76.9724.515 7/8 24 1/2
flagusflagfrflagukflagswchina flag icon 16flagjaflaghktaiwan flag icon 32flaggeCaspierpoland flag icon 32
77.2824.61637.5
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