Ring sizes

It is important to measure your finger size when you are at your normal size and weight, and temperature conditions are average. Ie, do not measure your ring size after a hot bath or on a very frosty day when your hands are cold.

To estimate your ring size :-

1. wrap a piece of string or strip of paper around your finger so that it is an accurate representation of the ring size you need. Mark where the two ends meet to form a complete circle - making sure that you mark it accurately - we recommend you use a piece of string which does not stretch and is cut to the ring size you want.

2. take this piece of string or strip of paper and lay if out on a flat surface so that you can measure the length of the material from step 1. Make sure you measure to the nearest millimetre (mm). This is the circumference of the ring.

3. Finally, use the table below to convert the length in mm into a UK ring size.

4. Please note, this chart size is perfect for a narrow ring, but for a wider band, it is necessary to go up a size.

(note - for piece of mind we recommend that you reverse steps 3 to 1 to check your measurements. To do this take a new piece of material, cut it to the length that represents your ring size in our table and try this on the finger to check if it fits as required).
  Measurement UK ring size USA ring size   Measurement UK ring size USA ring size
  37.5 mm A 0.5   55.3 mm P 7.5
  38.2 mm A 1/2 0.75   55.9 mm P 1/2 7.75
  38.9 mm B 1   56.6 mm Q 8
  39.6 mm B 1/2 1.25   57.2 mm Q 1/2 8.25
  40.2 mm C 1.5   58.4 mm R 8.625
  40.8 mm c 1/2 1.75   59.0 mm R 1/2 8.875
  41.5 mm D 2   59.4 mm S 9.125
  42.1 mm D 1/2 2.25   60.0 mm S 1/2 9.375
  42.7 mm E 2.5   60.6 mm T 9.625
  43.4 mm E 1/2 2.75   61.6 mm T 1/2 10
  44.0 mm F 3   62.2 mm U 10.25
  44.3 mm F 1/2 3.125   62.8 mm U 1/2 10.5
  44.9 mm G 3.375   63.1 mm V 10.625
  45.6 mm G 1/2 3.625   64.1 mm V 1/2 11
  45.9 mm H 3.75   64.3 mm W 11.125
  46.5 mm H 1/2 4   65.0 mm W 1/2 11.375
  47.1 mm I 4.25   65.7 mm X 11.625
  47.8 mm I 1/2 4.5   66.3 mm X 1/2 11.875
  48.1 mm J 4.625   66.6 mm Y 12
  49.0 mm J 1/2 5   67.2 mm Y 1/2 12.25
  49.3 mm K 5.125   67.9 mm Z 12.5
  50.0 mm K 1/2 5.375   68.5 mm Z 1/2 12.75
  50.3 mm L 5.5   69.1 mm Z + 1 13
  51.3 mm L 1/2 5.875   69.8 mm (Z + 1) 1/2 13.25
  51.5 mm M 6   70.4 mm Z + 2 13.5
  52.2 mm M 1/2 6.25   71.1 mm (Z + 2) 1/2 13.75
  52.8 mm N 6.5   71.7 mm Z + 3 14
  53.4 mm N 1/2 6.75   72.3 mm (Z + 3) 1/2 14.25
  54.0 mm O 7   73.0 mm Z + 4 14.5
  54.7 mm O 1/2 7.25   73.7 mm (Z + 4) 1/2 14.75