Find Your Perfect Fit
Every OriginBand is crafted to feel as good as it looks — use our guide to discover your exact ring size before ordering.
Women's Rings
| AUS & UK | EU & SPAIN | US & CANADA | INSIDE DIAMETER (MM) | INTERNAL CIRCUMFERENCE (MM) |
|---|---|---|---|
| H | 46.5 | 6 | 3 3/4 | 4.25 | INSIDE DIAMETER 14.88 (MM) | INTERNAL CIRCUMFERENCE 46.8 (MM) |
| I | 47.8 | 7 | 4 1/4 | 4.5 | INSIDE DIAMETER 15.09 (MM) | INTERNAL CIRCUMFERENCE 47.4 (MM) |
| J | 48.7 | 8 | 4 3/4 | 4.75 | INSIDE DIAMETER 15.49 (MM) | INTERNAL CIRCUMFERENCE 48.6 (MM) |
| K | 50.0 | 9 | 5 1/4 | 5.25 | INSIDE DIAMETER 15.90 (MM) | INTERNAL CIRCUMFERENCE 49.9 (MM) |
| L | 51.2 | 10 | 5 3/4 | 5.75 | INSIDE DIAMETER 16.31 (MM) | INTERNAL CIRCUMFERENCE 51.2 (MM) |
| M | 52.5 | 12 | 6 1/4 | 6.25 | INSIDE DIAMETER 16.71 (MM) | INTERNAL CIRCUMFERENCE 52.5 (MM) |
| N | 53.8 | 13 | 6 3/4 | 6.75 | INSIDE DIAMETER 17.12 (MM) | INTERNAL CIRCUMFERENCE 53.8 (MM) |
| O | 55.1 | 14 | 7 1/4 | 7.25 | INSIDE DIAMETER 17.53 (MM) | INTERNAL CIRCUMFERENCE 55.1 (MM) |
| P | 56.3 | 15 | 7 3/4 | 7.75 | INSIDE DIAMETER 17.93 (MM) | INTERNAL CIRCUMFERENCE 56.3 (MM) |
| Q | 57.6 | 16 | 8 1/4 | 8.25 | INSIDE DIAMETER 18.34 (MM) | INTERNAL CIRCUMFERENCE 57.6 (MM) |
| R | 58.9 | 17 | 8 3/4 | 8.75 | INSIDE DIAMETER 18.75 (MM) | INTERNAL CIRCUMFERENCE 58.9 (MM) |
| S | 60.2 | 18 | 9 1/4 | 9.25 | INSIDE DIAMETER 19.15 (MM) | INTERNAL CIRCUMFERENCE 60.2 (MM) |
| T | 61.4 | 19 | 9 3/4 | 9.75 | INSIDE DIAMETER 19.56 (MM) | INTERNAL CIRCUMFERENCE 61.4 (MM) |
| U | 62.7 | 20 | 10 1/4 | 10.25 | INSIDE DIAMETER 19.96 (MM) | INTERNAL CIRCUMFERENCE 62.7 (MM) |
Men's Rings
| AUS & UK | EU & SPAIN | US & CANADA | INSIDE DIAMETER (MM) | INTERNAL CIRCUMFERENCE (MM) |
|---|---|---|---|
| P | 56.3 | 15 | 7 3/4 | 7.75 | INSIDE DIAMETER 17.93 (MM) | INTERNAL CIRCUMFERENCE 56.3 (MM) |
| Q | 57.6 | 16 | 8 1/4 | 8.25 | INSIDE DIAMETER 18.34 (MM) | INTERNAL CIRCUMFERENCE 57.6 (MM) |
| R | 58.9 | 17 | 8 1/4 | 8.75 | INSIDE DIAMETER 18.75 (MM) | INTERNAL CIRCUMFERENCE 58.9 (MM) |
| S | 60.2 | 18 | 9 1/4 | 9.25 | INSIDE DIAMETER 19.15 (MM) | INTERNAL CIRCUMFERENCE 60.2 (MM) |
| T | 61.4 | 19 | 9 3/4 | 9.75 | INSIDE DIAMETER 19.56 (MM) | INTERNAL CIRCUMFERENCE 61.4 (MM) |
| U | 62.7 | 20 | 10 1/4 | 10.25 | INSIDE DIAMETER 19.96 (MM) | INTERNAL CIRCUMFERENCE 62.7 (MM) |
| V | 63.9 | 21 | 10 3/4 | 10.75 | INSIDE DIAMETER 20.37 (MM) | INTERNAL CIRCUMFERENCE 63.9 (MM) |
| W | 65.2 | 22 | 11 1/4 | 11.25 | INSIDE DIAMETER 20.78 (MM) | INTERNAL CIRCUMFERENCE 65.2 (MM) |
| X | 66.5 | 23 | 11 3/4 | 11.75 | INSIDE DIAMETER 21.18 (MM) | INTERNAL CIRCUMFERENCE 66.5 (MM) |
| Y | 67.8 | 24 | 12 1/4 | 12.25 | INSIDE DIAMETER 21.59 (MM) | INTERNAL CIRCUMFERENCE 67.8 (MM) |
| Z | 68.9 | 25 | 12 3/4 | 12.75 | INSIDE DIAMETER 21.99 (MM) | INTERNAL CIRCUMFERENCE 68.9 (MM) |
| Z+1 | 70.2 | 26 | 13 1/4 | 13.25 | INSIDE DIAMETER 22.40 (MM) | INTERNAL CIRCUMFERENCE 70.2 (MM) |
| Z+2 | 71.4 | 27 | 13 3/4 | 13.75 | INSIDE DIAMETER 22.81 (MM) | INTERNAL CIRCUMFERENCE 71.4 (MM) |
| Z+3 | 72.7 | 28 | 14 1/4 | 14.25 | INSIDE DIAMETER 23.21 (MM) | INTERNAL CIRCUMFERENCE 72.7 (MM) |
Download Our Free Measuring Guide
Download our printable ring-sizing guideto measure your finger precisely and find your perfect OriginBand fit.
Frequently Asked Questions – Ring Sizing
Use a soft measuring tape or strip of paper around the base of your finger. Mark where it overlaps, measure the length in millimeters, and compare it with our size chart. You can also measure the inner diameter of a ring that already fits you comfortably.
If your measurement falls between two sizes, we recommend choosing the larger size for comfort — especially if you prefer wider bands or wear your ring on warmer days.
Yes. Every OriginBand is crafted to international standards (UK/AU sizing system), with precise conversions for EU, US, and Spanish sizes. Our artisans hand-finish each piece to ensure accuracy.
Check our international conversion chart above. For example, a US 8 equals a UK Q or EU 57.6.
You can also contact us for a personalized recommendation if you’re unsure.
We offer a 30-Day Size Exchange Guarantee. Simply contact us within 30 days of delivery, and we’ll assist with resizing or an exchange (custom or engraved pieces excluded).