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Reference Information

Ring Sizes

Q: Can my chosen ring be sized?
A: Most rings can be sized unless they are eternity rings. Please give us the size of the ring you need if it is for personal use and we will quote you for re-sizing depending on whether or not it is possible. This in turn depends on:
  • The type of stone and setting
  • How many sizes difference, up or down
  • The width of the shank, the metal and chasing
  • Whether or not the ring has to be rhodium plated after sizing
Q: How can I measure my ring size?
A: Follow these steps:
  1. Wrap a piece of string or a strip of paper around the finger on which you wish to wear the ring.
  2. Mark the point where the two ends meet.
  3. Measure the string or paper against a ruler and use the circumference column in the table below to find your size. You need to be quite careful - adjacent ring sizes differ by only about 1mm in circumference.

 

 US/CA

Inside diameter
mm/inches

Inside circumference
mm/inches

 British

French

German

Japanese
 1 1/2  12.78 / .503  40.2 / 1.580  C  40 1/2  12 3/4  ---
 2  13.21 / .520  41.5 / 1.634  D  41 1/2  13 1/4  2
 2 1/2  13.61 / .536  42.7 / 1.684  E  42 3/4  13 3/4  3
 3  14.05 / .553  44.0 / 1.739  F  44  14  4
 3 1/2  14.45 / .569  45.2 / 1.788  G  45 1/4  14 1/2  ---
 4  14.86 / .585  46.5 / 1.836  H 1/2  46 1/2  15  7
 4 1/2  15.27 / .601  47.8 / 1.888  I 1/2  47 3/4  15 1/4  8
 5  15.70 / .618  49.0 / 1.941  J 1/2  49  15 3/4  9
 5 1/2  16.10 / .634  50.2 / 1.992  L  50 1/4  16  ---
 6  16.51 / .650  51.5 / 2.042  M  51 1/2  16 1/2  12
 6 1/2  16.92 .666  52.8 / 2.092  N  52 3/4  17  13
 7  17.35 / .683  54.0 / 2.146  N 1/2  54  17 1/4  14
 7 1/2  17.63 / .699  55.3 / 2.196  O 1/2  55 1/2  17 1/2  15
 8  18.19 / .716  56.6 / 2.249  P 1/2  56 3/4  18  16
 8 1/2  18.59 / .732  57.8 / 2.300  Q 1/2  58  18 1/2  17
 9  18.99 / .748  59.1 / 2.350  R 1/2  59 1/4  19  18
 9 1/2  19.41 / .764  60.3 / 2.400  S 1/2  60 1/2  19 1/2  19
 10  19.84 / .781  61.6 / 2.463  T 1/2  61 3/4  20  20
 10 1/2  20.24 / .797  62.8 / 2.504  U 1/2  62 3/4  20 1/4  22
 11  20.68 / .814  64.1 / 2.567  V 1/2  64 1/4  20 3/4  23
 11 1/2  21.01 / .830  66.0 / 2.608  W 1/2  66  21  24
 12  41.41 / .846  67.3 / 2.658  Y  67 1/4  21 3/4  25

All images are copyright Barbara Lankester, 2002-2004 and may not be reproduced without permission.