Sizing at home:
Step 1: Decide whether the ring you want to buy is narrow or wide, as this will affect the comfort of the fit. For a wider ring I recommend using a flat strip of paper to measure and for a thinner ring you can use a piece of floss.
Step 2: Wrap the paper or floss around the base of the finger you intend to wear the ring on. Make sure that you are not wrapping it too tightly around the finger, as it must be able to move over the knuckle.
Step 3: Mark with a pen where the paper or floss overlaps.
Step 4: Measure the length of the flat strip on a ruler in mm
Step 5: Take the above measurement in mm and divide by 3.14
(Eg. 56.9mm ÷ 3.14 = 18.1mm)
Step 6: Refer to the provided chart and select the ring size that best matches your mm measurement.
(Eg. 18.1mm = size P)
Converting alphabetical ring size to standard sizing:
XS = G, G½, H, H½, I, I½
S = J, J½, K, K½, L, L½
M = M, M½, N, N½, O, O½
L = P, P½, Q, Q½
XL = R, R½, S, S½, T
XXL (U, V, W, X, Y)
XXXL (Z, Z+1, Z+2, Z+3)