There are several systems of ring size around the world, to convert to your size please use the chart below.

If you dont know your ring size simply draw around the inside of a ring you know fits, then measure the diameter. Choose the closest size from the table.

US Ring Size     Diameter in Millimeters       British System

          0.5          -          11.5mm            -              A
          1             -          12.3mm            -              B
          1.5          -          12.7mm            -              C
          2             -          13.1mm            -              D
          2.5          -          13.5mm            -              E
          3             -          13.9mm            -              F

          4.25        -          15.1mm            -               I
          4.75        -          15.5mm            -              J
          5.25        -          15.9mm            -              K
          5.75        -          16.3mm            -              L
          6.25        -          16.7mm            -              M
          6.75        -          17.1mm            -              N
          7             -          17.5mm            -              O
          7.5          -          17.9mm            -              P
          8             -          18.3mm            -              Q
          8.5          -          18.7mm            -              R
          9             -          19.1mm            -              S
          9.5          -          19.5mm            -              T
          10           -          19.9mm            -              U
          10.5        -           20.3mm           -              V
          11           -           20.7mm           -              W
          11.5        -           21.1mm           -              X
          12           -           21.5mm           -              Y
          12.5        -           21.9mm           -              Z

 

Please feel free to print off and keep.