Disclaimer

Size Meadow shows ring size conversions and a printable sizer, so please treat every number as a guide and check the maker’s own size chart before you buy. Read what we tested and what we did not before you rely on the page.

Sizes are guides

The converter uses the formula diameter in mm = 11.63 + 0.8128 × US size, with European sizes taken as the inside circumference in millimeters (ISO 8653). Makers’ own charts can differ from it by a few tenths of a millimeter, and a wide band fits tighter than a thin one, so the right size for you can be half a size up or down.

What we tested, and what we did not

We compared the converter with a separate calculation for 273 inputs and printed the sheet to PDF to measure it: no differences, and one page in Letter and A4. We did not test your printer, every browser, every maker’s rings, or UK and Japanese sizes, which we do not convert.

Why a printout can be off scale

If the printer is set to “Fit to page” it shrinks the sheet and the circles are too small. Print at 100 percent (Actual size), then hold a bank card on the box: it must match 85.6 × 53.98 mm. If it does not, change the print scale and try again.

Health

Fingers swell with heat and change through the day. If a ring is stuck or hurts, do not force it; ask a doctor or a jeweler for help. Nothing on this site is medical advice. See also the terms of use and the privacy policy.

Frequently asked questions

Is the converter exact?

It follows a stated formula; a maker’s chart may differ slightly.

Why is my printed circle too small?

The printer probably used Fit to page. Print at 100 percent.

Where do I report a mistake?

Use the contact page.

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