Ring Size Chart
Use the full table across all available sizes.
Compare men’s ring sizes across US, UK, EU, and JP systems using inside diameter and circumference measurements. Use millimeter values first, then verify fit with practical measurement steps.
Men’s chart preview

Use this visual chart as a quick reference. The full table below has detailed diameter and circumference values.
This table focuses on commonly searched men’s size ranges (US 7 to US 13) using the same source data as the main chart and tools.
| US | UK | EU | JP | Diameter (mm) | Circumference (mm) | Diameter (in) |
|---|---|---|---|---|---|---|
| 7.0 | N 1/2 | 54 | 14 | 17.35 | 54.51 | 0.683 |
| 7.5 | O 1/2 | 56 | 16 | 17.75 | 55.76 | 0.699 |
| 8.0 | P 1/2 | 57 | 17 | 18.19 | 57.15 | 0.716 |
| 8.5 | Q 1/2 | 58 | 18 | 18.53 | 58.21 | 0.730 |
| 9.0 | R 1/2 | 59 | 19 | 18.89 | 59.34 | 0.744 |
| 9.5 | S 1/2 | 61 | 21 | 19.41 | 60.98 | 0.764 |
| 10.0 | T 1/2 | 62 | 22 | 19.84 | 62.33 | 0.781 |
| 10.5 | U 1/2 | 63 | 23 | 20.20 | 63.46 | 0.795 |
| 11.0 | V 1/2 | 64 | 24 | 20.68 | 64.97 | 0.814 |
| 11.5 | W 1/2 | 66 | 26 | 21.08 | 66.23 | 0.830 |
| 12.0 | Y | 67 | 27 | 21.49 | 67.51 | 0.846 |
| 12.5 | Z | 68 | 28 | 21.89 | 68.77 | 0.862 |
| 13.0 | Z+1 | 69 | 29 | 22.33 | 70.15 | 0.879 |
Measurements are approximate and may vary by jeweler, ring width, and sizing system.
Many adult men’s rings fall in the middle-to-larger range of standard ring charts, but the right size should always come from direct measurement.
Read how to measure ring size, then confirm with the ring size calculator or printable ring sizer.
Wider rings can feel tighter than narrow rings, and comfort-fit designs may vary by brand. If your measurement sits between rows, many buyers test the next size up for wider bands.
Diameter and circumference in millimeters are the clearest way to compare sizes across regions. For a dedicated millimeter lookup table, use Ring Size Chart in MM.
Use the full table across all available sizes.
Check millimeter-first diameter and circumference lookups.
Match diameter or circumference to the closest size.
Convert US, UK, EU, and JP size labels quickly.
Print and measure at home with scale checks.
Follow step-by-step measurement methods.
Measure finger circumference or inner ring diameter in millimeters, then match the closest row in the chart. Double-check with the calculator or printable sizer when possible.
Many adult men fall in middle-to-larger standard ranges, but there is no single guaranteed size. Final fit should be based on actual measurement.
The size system is the same. Men often wear larger sizes on average, but the correct size still depends on the exact finger measurement.
Measure inner diameter across the inside of the ring, or measure finger circumference around the base of the finger, then compare in millimeters.
Wider bands can feel tighter. If your fit is between sizes, many people compare both options and may choose the larger size for comfort.
Yes. Print at 100% scale, verify calibration, then cross-check the result with the chart or calculator for better confidence.
Measuring a ring that already fits the same finger is usually more reliable than guessing. Avoid using a ring from a different finger.