Nusa Ring Sizing Guide

We state all ring sizes as US sizes and use the ISO standard ring size conversion chart, which defines standard ring sizes in terms of the inner circumference of the the ring measured in millimeters. This ensures the most accurate conversions for all our global customers.

How to measure your finger for your perfect Nusa fit

Your finger will change size and shape depending on the time of the day and temperature. In order to obtain the most accurate measurement, we recommend the following:

  • Measure the finger at the end of the day – when they are warm (in the mornings fingers tend to be smaller when colder).
  • Take 3-4 readings so you can obtain the most accurate measurement.
  • Use a tape measure, avoid using string or paper since they can stretch and twist, giving you an inaccurate reading.

SIZE CONVERSION CHART

Inside diameter Inside circumference Sizes
Inches MM Inches MM United States,
Canada and
Mexico
(Used by Nusa)		 United Kingdom,
Ireland,
Australia and
New Zealand		 China
Japan,
South America		 India Italy,
Spain,
Netherlands,
Switzerland
0.618 15.7 1.94 49.3 5 J ½ 9 9.25
0.65 16.51 2.04 51.9 6 L ½ 11 12 11.75
0.682 17.32 2.14 54.4 7 N ½ 14 14 14.5
0.714 18.14 2.24 57 8 P ½ 16 17 17
0.746 18.95 2.34 59.5 9 R ½ 18 19.5
0.778 19.76 2.44 62.1 10 T ½ 20 22 22
0.81 20.57 2.54 64.6 11 V ½ 23 25 24.75
0.842 21.39 2.65 67.2 12 X ½ 25 27 27.25

Check the size of an existing ring

Download and print the Nusa ring size guide and follow the instructions to find the size of an existing ring.

Nusa Ring Sizing Guide