Ideally fingers should be sized properly by a professional jeweller using a ring sizer. If this is not possible then the following may be used to estimate your size.

If you have an existing ring …

  1. Measure the diameter (mm) of a ring that fits the desired finger
  2. Use the Ring Sizing Chart below to locate size

Follow these directions to measure your finger. They will provide an approximate guide to establish your ring size. For a completely accurate measurement go to a jeweller and have your finger sized precisely.

  1. Find a piece of string or strip of paper no wider than 1.4 cm (1/2 inch)
  2. Wrap it around the base of the appropriate finger.
  3. Use a pen to mark the point on the string/paper where it overlaps, forming a complete circle.
  4. With a ruler, measure the length from the starting end of the string/paper to the pen mark.
  5. Use the Ring Sizing Chart chart below to determine your UK ring size.
  6. For the most accurate reading using this method measure the finger at the end of the day when the finger is the largest. 

Here are some tips to make your ring size measurement more accurate:

The average ring size for women is size N ½. The average ring size for men is size T ½.
A ring should fit secure enough so that it will never fall off. It should have a loose comfortable fit when sliding it over your knuckle.

UK Ring Size Chart - Measurement

G – 45.5mm               H – 46.7mm                   I – 48mm                      J – 48.7mm

K – 49.9mm               L – 51.2mm                  M – 52.5mm                   N – 53.8mm

O – 55mm                 P – 56.3mm                   Q – 57.6mm                   R – 58.9mm

S – 60.1mm               T – 61.4mm                   U – 62.7mm                   V – 64mm

W – 65.2mm              X – 66.5mm