Ring sizing
Find your ring size at home, and know it is right
One ring size is less than a millimetre. A printer that shrinks the page, or a screen that is not to scale, gets you the wrong ring. Our sizers check themselves first.
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Common sizes
| US | UK | EU | Diameter |
|---|---|---|---|
| 5 | J½ | 49 | 15.7 mm |
| 6 | L½ | 52 | 16.5 mm |
| 7 | N½ | 54 | 17.3 mm |
| 8 | P½ | 57 | 18.1 mm |
| 9 | R½ | 60 | 18.9 mm |
| 10 | T½ | 62 | 19.8 mm |
Tools
- Printable ring sizer Finger strip and ring circles in US, UK and EU sizes. If your printer shrinks the page, we correct it. Open →
- Ring sizer on screen Set your screen to true size with a bank card, then match a ring you already own. Open →
- Ring size converter Turn a measurement in inches, cm or mm into a ring size, or convert between US, UK, EU and more. Open →
Charts and guides
- Ring size chart US, UK, EU, Italian, Swiss and Japanese sizes side by side, with diameter and circumference.
- Men's ring size chart US 7 to 16 with UK and EU sizes, plus what changes for wide bands and big knuckles.
- US ring size chart Every US and Canadian size from 3 to 13 in quarter steps, in mm and inches.
- How to measure your ring size at home Three methods that work, when to measure, and when to see a jeweller instead.
Why "print at 100%" is not enough
Nearly every printable ring sizer online is a jeweller's PDF that says "print at 100%" and hopes for the best. But many printers quietly shrink the page by 2 to 6 percent to fit their margins, and you cannot see it. A 3% shrink is half a ring size.
Our printable ring sizer carries a 100 mm bar and a 4 inch bar. Measure one with a ruler. If it is off, tell us what you measured, and we build a PDF that cancels your printer's error. The on-screen sizer does the same for screens, using a bank card as the ruler.
The numbers come from each country's published sizing standard (US, UK, ISO 8653 for Europe, and Japan), calculated rather than copied, so every page on this site agrees with every other.
Buying an engagement or wedding ring?
Use these tools to get close, then confirm with a jeweller's metal sizer, which most jewellers offer for free. It is the one time an extra check is always worth it. Read how to measure your ring size at home for the details that make the biggest difference.
SizeCheck starts with rings. Bracelet, shoe and clothing size tools are next.