Our Standard Ring Sizes

Updated at 2026-05-11


NineTwoFive uses its own ring sizing system. The sizes shown in this tab are our standard sizes, based on the inside circumference of the ring in millimeters.

To find the right size, measure your finger circumference in mm and match it to one of our standard sizes below. This is the most accurate way to choose your ring size.

Please note that UK and US sizes are shown only as a general conversion guide. Ring size charts can vary between brands and countries, so a UK or US size you already know may not always match our chart exactly. For the best fit, always use your finger circumference in millimeters as the leading measurement.

If your measurement falls between two sizes, we usually recommend choosing the larger size for a more comfortable fit.

If your size falls outside the standard sizes shown here, you may need a custom size. In that case, select CUSTOM on the product page and enter your exact inside circumference in mm.

Finger circumference Our size UK size US size
54–55 mm XXS O 7
57–58 mm XS Q 8
59–60 mm S R 3/4 9
62–63 mm M T 1/2 10
64–65 mm L V 1/2 11
67–68 mm XL Y 12
69–70 mm XXL Z+1 13
71–72.5 mm XXXL Z+2.5 14