How To Measure Your Ring Size

Size
(mm)
Diameter
(mm)
Size
(inches)
Australian
size
51 16.10 2 L
52 16.51 2 1/16 M
53 16.92 2 2/16 N
55 17.35 2 3/16 O
56 17.75 2 4/16 P
57 18.19 2 5/16 Q
58 18.53 2 6/16 Q 1/2
59 18.89 2 7/16 R 1/2

Before you measure your finger make sure you are not too hot or cold. If you are hot then it is likely your finger will be slightly larger than it would usually be, and conversely a cold finger will be smaller. It is very important that your finger is measured at its normal size.

Find a piece of string and wrap it around the base of your finger. Mark off the length on the string and measure its length in millimetres. Match the length to the chart above rounding up if necessary.

Be aware of knuckle size. Some people have larger knuckles than the base of their fingers. If this is the case a slightly larger size may be needed in order to get it over the knuckle.