Ring Sizing Information

At Coral Covey we use the UK Standard of ring sizing (where each size is represented by a letter, e.g. 'M'). To order from us, you will need to know your ring size according to the UK Standard sizing. On the page below we offer a conversion table if you know your ring size based on another standard.

Otherwise, there are two relatively simple methods of determining your size. Simply print out our 'Ring Size Chart' and follow our instructions below. Please note: it is important that this document is printed at 100% scale so that the physical sizing is correct.

Click here for your printable guide. 

Method 1: Measurement of your finger

Use the printed document we have created to measure your finger. Here are some important things to note before measuring:

  • Measure your finger at the end of the day.
  • Do not measure your finger when it is hot or cold; this can affect your finger's size.
  • Measure between the knuckle and the first joint of the finger (where the ring will sit).
  • Measure the finger from the hand which you will use your ring; left and right hands can differ slightly in size.
  • Make sure that the chosen size leaves enough room for the ring to pass easily along the entire length of the finger.
  • If your measured finger size falls between two sizes, choose the larger size.
  • The ring size/geometry can affect the choice of size: wide-band rings can be worn more loosely than a narrower rings.

Method 2: Measurement of an existing ring

Use the printed document as a reference template to measure an existing ring. Here are some important things to note when measuring an existing ring size:

  • Align the inside edge of the existing ring with the circle on the chart which most closely matches the ring size. The less printed circle that is visible around the inside of the ring, the better.
  • Be mindful of big variations in geometry between the ring being measured and the ring you intend to order. Very wide-band rings are often designed for a slightly looser fit. If possible, use an existing ring that closely matches the overall geometry/style of the ring to be ordered.

Sizing conversion chart

If you have an existing ring size that requires conversion to the UK Standard, then please refer to this chart:

UK Size European
Size (Approx.)
American Size
(Approx.)
  Inside 
Diameter
Inches mm
G       0.5680 14.427
      0.5758 14.625
  46     0.5765 14.642
    4   0.5820 14.783
H       0.5835 14.821
  47     0.5890 14.961
      0.5913 15.019
      0.5980 15.189
I       0.5990 15.215
  48     0.6015 15.279
      0.6068 15.413
  49 5   0.6141 15.597
J       0.6145 15.608
      0.6223 15.806
  50     0.6266 15.916
K     0.6300 16.002
      0.6378 16.200
  51     0.6391 16.234
L   6   0.6455 16.396
  52     0.6517 16.552
      0.6533 16.594
M       0.6610 16.789
      0.6620 16.815
  53     0.6642 16.871
      0.6688 16.988
N       0.6765 17.183
  54     0.6767 17.189
    7   0.6780 17.221
      0.6843 17.381
  55     0.6893 17.507
O       0.6920 17.577
      0.6940 17.628
      0.6998 17.775
  56     0.7018 17.826
P       0.7075 17.971
    8   0.7100 18.034
  57     0.7143 18.144
      0.7153 18.169
Q       0.7230 18.364
      0.7265 18.453
  58     0.7269 18.462
      0.7308 18.562
R       0.7385 18.758
  59     0.7394 18.780
    9   0.7430 18.872
      0.7463 18.956
  60     0.7519 19.098
S       0.7540 19.152
      0.7590 19.279
      0.7618 19.350
  61     0.7644 19.416
T       0.7695 19.545
  62     0.7770 19.736
      0.7772 19.741
    10   0.7780 19.761
U       0.7850 19.939
  63     0.7895 20.054
      0.7928 20.137
    10½   0.7940 20.168
V       0.8005 20.333
  64     0.8020 20.372
      0.8083 20.531
    11   0.8110 20.599
  65     0.8146 20.690
W       0.8160 20.726
      0.8238 20.925
  66 11½   0.8271 21.008
X       0.8315 21.120
      0.8393 21.318
  67     0.8396 21.326
    12   0.8430 21.412
Y       0.8470 21.514
  68     0.8522 21.645
      0.8548 21.712
    12½   0.8590 21.819
Z       0.8625 21.908
  69     0.8647 21.963
      0.8703 22.106
    13   0.8750 22.225