Standard & Custom Sizes

Updated at 2026-07-03


Finding Your Ring Size

Getting your ring size right is the most important step before ordering. NineTwoFive uses its own sizing system, so if you already know your UK or US size, use the chart below to find your NineTwoFive equivalent.

Please keep in mind that ring size charts can vary between brands, countries, and measurement systems. For example, a UK size you know from another jeweller may not always match the UK conversion shown in our chart exactly. That is why we always recommend checking your finger circumference in millimeters to make sure you choose the correct size.

For the most accurate result, measure your finger circumference in mm using a soft tape measure or a strip of paper. Match that measurement to the chart below. Our sizes are designed to fit the finger circumferences listed in our own size chart.

If your size falls outside our standard size range, don’t worry β€” we can usually still make it for you. Simply select CUSTOM on the product page, enter your exact inside circumference in mm in the field provided, and we’ll craft it to your measurements.

Please note that custom pieces are made separately in Bali and typically take 8–10 weeks to produce.

Inside diameter Finger circumfernce UK size US size Recommended size
13.61 42.76 E 2 1/2 CUSTOM
13.83 43.45 E 1/2 2 3/4 CUSTOM
14.05 44.14 F 3 CUSTOM
14.15 44.45 F 1/2 3 1/8 CUSTOM
14.25 44.77 F 3/4 3 1/4 CUSTOM
14.36 45.11 G 3 3/8 CUSTOM
14.45 45.4 G 1/4 3 1/2 CUSTOM
14.56 45.74 G 1/2 3 5/8 CUSTOM
14.65 46.02 H 3 3/4 CUSTOM
14.86 46.68 H 1/2 4 CUSTOM
15.04 47.25 I 4 1/4 CUSTOM
15.27 47.97 I 1/2 4 1/2 CUSTOM
15.4 48.38 J 4 5/8 CUSTOM
15.53 48.79 J 1/4 4 3/4 CUSTOM
15.7 49.32 J 1/2 5 CUSTOM
15.8 49.64 K 5 1/8 CUSTOM
15.9 49.95 K 1/4 5 1/4 CUSTOM
16 50.27 K 1/2 5 3/8 CUSTOM
16.1 50.58 L 5 1/2 CUSTOM
16.3 51.21 L 1/4 5 3/4 CUSTOM
16.41 51.55 L 1/2 5 7/8 CUSTOM
16.51 51.87 M 6 CUSTOM
16.71 52.5 M 1/2 6 1/4 CUSTOM
16.92 53.16 N 6 1/2 CUSTOM
17.13 53.82 N 1/2 6 3/4 XXS
17.35 54.51 O 7 XXS
17.45 54.82 O 1/2 7 1/4 XXS
17.75 55.76 P 7 1/2 CUSTOM
17.97 56.45 P 1/2 7 3/4 XS
18.19 57.15 Q 8 XS
18.35 57.65 Q 1/2 8 1/4 XS
18.53 58.21 Q 3/4 8 1/2 CUSTOM
18.61 58.47 R 8 5/8 CUSTOM
18.69 58.72 R 1/4 8 3/4 S
18.8 59.06 R 1/2 8 7/8 S
18.89 59.34 R 3/4 9 S
19.1 60 S 9 1/8 S
19.22 60.38 S 1/4 9 1/4 CUSTOM
19.31 60.66 S 1/2 9 3/8 CUSTOM
19.41 60.98 S 3/4 9 1/2 CUSTOM
19.51 61.29 T 9 5/8 CUSTOM
19.62 61.64 T 1/4 9 3/4 M
19.84 62.33 T 1/2 10 M
20.02 62.89 U 10 1/4 M
20.2 63.46 U 1/2 10 1/2 CUSTOM
20.32 63.84 V 10 5/8 CUSTOM
20.44 64.21 V 1/4 10 3/4 L
20.68 64.97 V 1/2 11 L
20.76 65.22 W 11 1/8 L
20.85 65.5 W 1/4 11 1/4 L
20.94 65.78 W 1/2 11 3/8 L
21.08 66.22 W 3/4 11 1/2 CUSTOM
21.18 66.54 X 11 5/8 CUSTOM
21.24 66.73 X 1/4 11 3/4 CUSTOM
21.3 66.92 X 1/2 11 7/8 XL
21.49 67.51 Y 12 XL
21.69 68.14 Y 1/2 12 1/4 XL
21.89 68.77 Z 12 1/2 CUSTOM
22.1 69.43 Z +1/2 12 3/4 XXL
22.33 70.15 Z+1 13 XXL
22.6 71 Z+1.5 13.5 CUSTOM
22.69 71.28 Z+2 - CUSTOM
22.92 72 Z+2.5 14 XXXL
23.06 72.45 Z+3 - CUSTOM
23.24 73.01 Z+3.5 - CUSTOM
23.47 73.73 Z+4 - CUSTOM
23.55 73.98 Z+4.5 - CUSTOM
23.87 74.99 Z+5 - CUSTOM
24.27 76.25 Z+6 - CUSTOM