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International Ring Finger Sizes | |
Finger Sizes
We get asked about finger size conversions quite frequently, and we have never seen a chart which lists British, European, Japanese, and American systems side by side, so we created our own!
If you wish to order a ring from us, please feel free to specify the finger size in any of these systems.
We always specify our finger sizes by "leading edge" rather than "middle".
Diameter = Internal diameter in millimetres.
Circumference = Internal circumference in millimetres.
Britain | Europe | Japan | USA | Diameter | Circumference |
| | | 0 | 11.54 | 36.25 |
A | | | | 11.90 | 37.38 |
| | 0 | | 12.00 | 37.70 |
A1/2 | | | | 12.10 | 38.01 |
B | | | | 12.30 | 38.64 |
| | | 1 | 12.37 | 38.86 |
B1/2 | | | | 12.50 | 39.27 |
| | | 11/4 | 12.58 | 39.52 |
C | | | | 12.70 | 39.90 |
| 0.15 | | 11/2 | 12.78 | 40.15 |
C1/2 | 0.53 | | | 12.90 | 40.53 |
| 0.84 | 1 | 13/4 | 13.00 | 40.84 |
| 1.00 | | | 13.05 | 41.00 |
Britain | Europe | Japan | USA | Diameter | Circumference |
D | 1.15 | | | 13.10 | 41.15 |
| 1.50 | | 2 | 13.21 | 41.50 |
D1/2 | 1.78 | | | 13.30 | 41.78 |
| 1.88 | 2 | | 13.33 | 41.88 |
| 2.00 | | | 13.37 | 42.00 |
| 2.13 | | 21/4 | 13.41 | 42.13 |
E | 2.41 | | | 13.50 | 42.41 |
| 2.76 | | 21/2 | 13.61 | 42.76 |
| 2.91 | 3 | | 13.66 | 42.91 |
E1/2 | 3.00 | | | 13.69 | 43.00 |
| 3.42 | | 23/4 | 13.82 | 43.42 |
F | 3.67 | | | 13.90 | 43.67 |
| 3.98 | 4 | | 14.00 | 43.98 |
| 4.00 | | | 14.01 | 44.00 |
| 4.14 | | 3 | 14.05 | 44.14 |
Britain | Europe | Japan | USA | Diameter | Circumference |
F1/2 | 4.30 | | | 14.10 | 44.30 |
| 4.74 | | 31/4 | 14.24 | 44.74 |
G | 4.92 | | | 14.30 | 44.92 |
| 5.00 | | | 14.32 | 45.00 |
| 5.02 | 5 | | 14.33 | 45.02 |
| 5.40 | | 31/2 | 14.45 | 45.40 |
G1/2 | 5.55 | | | 14.50 | 45.55 |
| 6.00 | | | 14.64 | 46.00 |
| 6.02 | | 33/4 | 14.65 | 46.02 |
| 6.06 | 6 | | 14.66 | 46.06 |
H | 6.18 | | | 14.70 | 46.18 |
| 6.68 | | 4 | 14.86 | 46.68 |
Britain | Europe | Japan | USA | Diameter | Circumference |
H1/2 | 6.81 | | | 14.90 | 46.81 |
| 7.00 | | | 14.96 | 47.00 |
| 7.12 | 7 | | 15.00 | 47.12 |
| 7.34 | | 41/4 | 15.07 | 47.34 |
I | 7.44 | | | 15.10 | 47.44 |
| 7.97 | | 41/2 | 15.27 | 47.97 |
| 8.00 | | | 15.28 | 48.00 |
I1/2 | 8.07 | | | 15.30 | 48.07 |
| 8.16 | 8 | | 15.33 | 48.16 |
| 8.63 | | 43/4 | 15.48 | 48.63 |
J | 8.69 | | | 15.50 | 48.69 |
| 9.00 | | | 15.60 | 49.00 |
| 9.20 | 9 | | 15.66 | 49.20 |
Britain | Europe | Japan | USA | Diameter | Circumference |
J1/2 | 9.32 | | 5 | 15.70 | 49.32 |
K | 9.95 | | 51/4 | 15.90 | 49.95 |
| 10.00 | | | 15.92 | 50.00 |
| 10.27 | 10 | | 16.00 | 50.27 |
K1/2 | 10.58 | | 51/2 | 16.10 | 50.58 |
| 11.00 | | | 16.23 | 51.00 |
L | 11.24 | | 53/4 | 16.31 | 51.24 |
| 11.30 | 11 | | 16.33 | 51.30 |
L1/2 | 11.87 | | 6 | 16.51 | 51.87 |
| 12.00 | | | 16.55 | 52.00 |
| 12.34 | 12 | | 16.66 | 52.34 |
M | 12.46 | | | 16.70 | 52.46 |
| 12.56 | | 61/4 | 16.73 | 52.56 |
| 13.00 | | | 16.87 | 53.00 |
Britain | Europe | Japan | USA | Diameter | Circumference |
M1/2 | 13.09 | | | 16.90 | 53.09 |
| 13.16 | | 61/2 | 16.92 | 53.16 |
| 13.41 | 13 | | 17.00 | 53.41 |
N | 13.72 | | | 17.10 | 53.72 |
| 13.85 | | 63/4 | 17.14 | 53.85 |
| 14.00 | | | 17.19 | 54.00 |
N1/2 | 14.35 | | | 17.30 | 54.35 |
| 14.44 | 14 | | 17.33 | 54.44 |
| 14.51 | | 7 | 17.35 | 54.51 |
O | 14.98 | | | 17.50 | 54.98 |
| 15.00 | | 71/4 | 17.56 | 55.00 |
| 15.48 | 15 | | 17.66 | 55.48 |
Britain | Europe | Japan | USA | Diameter | Circumference |
O1/2 | 15.61 | | | 17.70 | 55.61 |
| 15.76 | | 71/2 | 173/4 | 55.76 |
| 16.00 | | | 17.83 | 56.00 |
P | 16.23 | | | 17.90 | 56.23 |
| 16.45 | | 73/4 | 17.97 | 56.45 |
| 16.55 | 16 | | 18.00 | 56.55 |
P1/2 | 16.86 | | | 18.10 | 56.86 |
| 17.00 | | | 18.14 | 57.00 |
| 17.15 | | 8 | 18.19 | 57.15 |
Q | 17.49 | | | 18.30 | 57.49 |
| 17.59 | 17 | | 18.33 | 57.59 |
| 17.77 | | 81/4 | 18.39 | 57.77 |
| 18.00 | | | 18.46 | 58.00 |
Britain | Europe | Japan | USA | Diameter | Circumference |
Q1/2 | 18.12 | | | 18.50 | 58.12 |
| 18.40 | | 81/2 | 18.59 | 58.40 |
| 18.62 | 18 | | 18.66 | 58.62 |
R | 183/4 | | | 18.70 | 583/4 |
| 19.00 | | 83/4 | 18.78 | 59.00 |
R1/2 | 19.38 | | | 18.90 | 59.38 |
| 19.66 | | 9 | 18.99 | 59.66 |
| 19.69 | 19 | | 19.00 | 59.69 |
S | 20.00 | | | 19.10 | 60.00 |
| 20.38 | | 91/4 | 19.22 | 60.38 |
S1/2 | 20.63 | | | 19.30 | 60.63 |
| 20.73 | 20 | | 19.33 | 60.73 |
| 20.98 | | 91/2 | 19.41 | 60.98 |
| 21.00 | | | 19.42 | 61.00 |
Britain | Europe | Japan | USA | Diameter | Circumference |
T | 21.26 | | | 19.50 | 61.26 |
| 21.67 | | 93/4 | 19.63 | 61.67 |
| 21.76 | 21 | | 19.66 | 61.76 |
T1/2 | 21.89 | | | 19.70 | 61.89 |
| 22.00 | | | 19.74 | 62.00 |
| 22.33 | | 10 | 19.84 | 62.33 |
U | 22.52 | | | 19.90 | 62.52 |
| 22.83 | 22 | | 20.00 | 62.83 |
| 23.00 | | 101/4 | 20.05 | 63.00 |
U1/2 | 23.15 | | | 20.10 | 63.15 |
| 23.59 | | 101/2 | 20.24 | 63.59 |
Britain | Europe | Japan | USA | Diameter | Circumference |
V | 23.77 | | | 20.30 | 63.77 |
| 23.87 | 23 | | 20.33 | 63.87 |
| 23.99 | | | 20.37 | 63.99 |
| 24.28 | | 103/4 | 20.46 | 64.28 |
V1/2 | 24.40 | | | 20.50 | 64.40 |
| 24.91 | 24 | | 20.66 | 64.91 |
| 24.97 | | 11 | 20.68 | 64.97 |
W | 25.00 | | | 20.69 | 65.00 |
| 25.60 | | 111/4 | 20.88 | 65.60 |
Britain | Europe | Japan | USA | Diameter | Circumference |
W1/2 | 25.66 | | | 20.90 | 65.66 |
| 25.97 | 25 | | 21.00 | 65.97 |
| 26.00 | | | 21.01 | 66.00 |
| 26.22 | | 111/2 | 21.08 | 66.22 |
X | 26.29 | | | 21.10 | 66.29 |
X1/2 | 26.92 | | 113/4 | 21.30 | 66.92 |
| 27.01 | 26 | | 21.33 | 67.01 |
Y | 27.51 | | 12 | 21.49 | 67.51 |
| 28.02 | | | 21.65 | 68.02 |
| 28.05 | 27 | | 21.66 | 68.05 |
Y1/2 | 28.20 | | 121/4 | 21.71 | 68.20 |
Z | 28.77 | | 121/2 | 21.89 | 68.77 |
| 28.99 | | | 21.96 | 68.99 |
| 29.12 | 28 | | 22.00 | 69.12 |
Britain | Europe | Japan | USA | Diameter | Circumference |
Z1/2 | 29.43 | | | 22.10 | 69.43 |
| 29.49 | | 123/4 | 22.12 | 69.49 |
Z+1 | 29.99 | | | 22.28 | 69.99 |
| 30.15 | 29 | 13 | 22.33 | 70.15 |
Z+11/2 | 30.69 | | | 22.50 | 70.69 |
| 30.81 | | 131/4 | 22.54 | 70.81 |
| 31.00 | | | 22.60 | 71.00 |
| 31.19 | 30 | | 22.66 | 71.19 |
Z+2 | 31.31 | | | 22.70 | 71.31 |
| 31.47 | | 131/2 | 223/4 | 71.47 |
Z+21/2 | 32.01 | | 133/4 | 22.92 | 72.01 |
| 32.26 | 31 | | 23.00 | 72.26 |
Britain | Europe | Japan | USA | Diameter | Circumference |
Z+3 | 32.57 | | | 23.10 | 72.57 |
| 32.76 | | 14 | 23.16 | 72.76 |
| 33.01 | | | 23.24 | 73.01 |
Z+31/2 | 33.20 | | | 23.30 | 73.20 |
| 33.32 | | | 23.34 | 73.32 |
| 33.29 | 32 | | 23.33 | 73.29 |
| 33.42 | | 141/4 | 23.37 | 73.42 |
Z+4 | 33.83 | | | 23.50 | 73.83 |
| 33.98 | | 141/2 | 23.55 | 73.98 |
| 34.33 | 33 | | 23.66 | 74.33 |
Z+41/2 | 34.46 | | | 23.70 | 74.46 |
| 34.71 | | 143/4 | 23.78 | 74.71 |
| 34.99 | | | 23.87 | 74.99 |
Britain | Europe | Japan | USA | Diameter | Circumference |
Z+5 | 35.08 | | | 23.90 | 75.08 |
| 35.40 | 34 | 15 | 24.00 | 75.40 |
Z+51/2 | 35.71 | | | 24.10 | 75.71 |
| 36.00 | | 151/4 | 24.19 | 76.00 |
Z+6 | 36.34 | | | 24.30 | 76.34 |
| 36.43 | 35 | | 24.33 | 76.43 |
| 36.69 | | 151/2 | 24.41 | 76.69 |
Z+61/2 | 37.00 | | | 24.51 | 77.00 |
| 37.31 | | 153/4 | 24.61 | 77.31 |
| 37.47 | 36 | | 24.66 | 77.47 |
Z+7 | 37.60 | | | 24.70 | 77.60 |
| 38.00 | | 16 | 24.83 | 78.00 |
Z+71/2 | 38.23 | | | 24.90 | 78.23 |
| 38.54 | 37 | 161/4 | 25.00 | 78.54 |
You may also wish to refer to our Ring Sizing Advice page.
© Lawrence Chard 1999
Other jewellers are welcome to use this chart.
You may ask to copy this chart provided you agree to attach an acknowledgment and copyright notice to your copy.
Formulae:-
Diameter = (British Size x .4) + 11.5; where A = 1, B = 2, Z = 26, etc.
Diameter = (American Size x 0.83) + 11.5
European Size = Circumference - 40
Diameter = (Japanese Size / 3) +12.67
In all cases, diameter is in millimetres.
Diamond Ring Collet & Setting Styles
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