Ring Size Tool

How To Measure Your Ring Size

There are a few different methods you can use to find out your perfect ring size. If you already own a ring in the correct size, you can physically measure it. If not, you can measure your finger to determine your size. Discover how to measure your ring size below.

Our store policy - order the wrong ring size? No worries - we offer free exchanges if the ring is too large or small. We want you to be confident when buying online, that we will ensure you get the right fitting ring without too much fuss.

 Method 1: Measure a Ring

  1. Find a ring that fits comfortably on the finger you intend to wear your new ring on.
  2. Measure the internal diameter of the ring, using a ruler or measuring tape. To do so, ensure you are using a ruler with millimetre (mm) measurements, then place your ring on top of the ruler and measure the inside of the circle – in other words, the part that is in contact with your finger.
  3. Use our Ring Size Chart to convert your diameter measurement into the correct ring size.
    Measure a Ring size guide | Michael Hill
    Ring Size Guide | Michael Hill

    Method 2: Measure your Finger

    1. Cut a piece of string or paper to a length of around 10 centimetres (cm).
    2. Wrap the paper or string around your finger at the point where the ring should sit. Pull so that the string fits comfortably around your finger - not too tight and not too loose.
    3. Use a pen to mark the point where the end of the string or paper overlaps itself.
    4. Lay the string or paper out against a ruler or tape measure, and measure the length (mm) from its end to the point you have marked with pen.
    5. This measurement will give you your finger circumference. Use it to find your size using our Ring Size Table below.

      Expert Tips

      1. Always double-check your measurements for accuracy.
      2. Your finger size can fluctuate slightly during the day, over time, and depending on the temperature. If measuring your actual finger, do so in the afternoon when your hands are warm for best results. If you fall between two ring sizes, choose the larger size (or half size) to ensure a comfortable fit.
      3. Ensure you measure the exact finger on which you intend to wear your ring (or a ring that you wear on the same finger). Your ring size will vary between your fingers as well as between your hands.

       Ring Size Table

      Inside Circumference US, Canada UK, Australia
      IN MM    
      1.74 44.2 3 F
      1.77 44.8 3.25 F 1/2
      1.79 45.5 3.5 G
      1.82 46.1 3.75 G 1/2
      1.84 46.8 4 H
      1.87 47.4 4.25 H 1/2
      1.89 48 4.5 I
      1.92 48.7 4.75 J
      1.94 49.3 5 J 1/2
      1.97 50 5.25 K
      1.99 50.6 5.5 K 1/2
      2.02 51.2 5.75 L
      2.04 51.9 6 L 1/2
      2.07 52.5 6.25 M
      2.09 53.1 6.5 M 1/2
      2.12 53.8 6.75 N
      2.14 54.4 7 N 1/2
      2.17 55.1 7.25 O
      2.19 55.7 7.5 O 1/2
      2.22 56.3 7.75 P
      2.24 57 8 P 1/2
      2.27 57.6 8.25 Q
      2.29 58.3 8.5 Q 1/2
      2.32 58.9 8.75 R
      2.34 59.5 9 R 1/2
      2.37 60.2 9.25 S
      2.39 60.8 9.5 S 1/2
      2.42 61.4 9.75 T
      2.44 62.1 10 T 1/2
      2.47 62.7 10.25 U
      2.49 63.4 10.5 U 1/2
      2.52 64 10.75 V
      2.54 64.6 11 V 1/2
      2.57 65.3 11.25 W
      2.59 65.9 11.5 W 1/2
      2.62 66.6 11.75 X
      2.65 67.2 12 X 1/2
      2.68 68.1 12.25 Y
      2.71 68.5 12.5 Z
      2.72 69.1 12.75 Z 1/2
      2.75 69.7 13 ---