What is my Ring Size?

WHAT IS MY RING SIZE?

Before you start shopping for jewellery, make sure you know what size ring you need so that you can achieve a perfect fit every time.

Your ring size can be determined by placing a ring that fits you on a professional ring size mandrel, using a professional ring sizer, or finding an approximate fit with a ring size chart or finger size strip.


How to measure your own ring size

If you don’t have access to a professional ring sizer, you can find an approximate measure for your finger with a strip of thick cardboard.

  1. Cut a piece of thick cardboard or plastic and wrap it around your finger.
    (Do not use a piece of string as this will bend to the shape of your finger.)
  2. Mark the exact spot where the ends join.
  3. With a ruler, measure the length of this piece of cardboard.
  4. Find this measurement on the below chart, which will tell you the corresponding ring size.

A couple of notes:

  • After you have measured the length then tape it together and put it on your finger just like a real ring. Make it tight but be sure not to push or squeeze it because you won’t be able to do that with a real ring. Make sure it fits over the knuckle.
  • If you have used a thin piece of wire and your new ring is a wide band you must add some size to allow for this. The reverse may also be true. If you use a wide piece of cardboard but the ring is going to be thin then take a quarter size off.
  • Remember to measure your finger at room temperature as well as both the heat and cold as these can cause your fingers to swell or constrict.

Ring Size Chart

Inside diameter (mm) Inside diameter (inches) Inside circumference (mm) Inside circumference (inches) US ring size British & Australian ring size
14.9 0.586 46.7 1.840 4 H
15.3 0.602 48 1.890 4 ½ H ½
15.7 0.618 49.3 1.941 5 J ½
16.1 0.634 50.6 1.991 5 ½ K ½
16.5 0.650 51.8 2.041 6 L ½
16.9 0.666 53.1 2.091 6 ½
17.3 0.682 54.4 2,141 7 N ½
17.7 0.698 55.7 2.192 7 ½ O ½
18.1 0.714 56.9 2.242 8 P ½
18.5 0.730 58.2 2.292 8 ½ Q ½
18.9 0.746 59.5 2.2342 9 R ½
19.4 0.762 60.8 2.393 9 ½ S ½
19.8 0.778 62.1 2.443 10 T ½
20.2 0.794 63.3 2.493 10 ½ U ½
20.6 0.810 64.6 2.543 11 V ½
21 0.826 65.9 2.594 11 ½ W ½
21.4 0.842 67.2 2.644 12 X ½