What ring size is 22 mm?
Approximately US size 12.7522 mm inside diameter equals 69.1 mm inside circumference.
How this conversion is calculated
The circumference is diameter × π. The US result is rounded to the nearest quarter size because jewellers normally sell discrete sizes rather than an infinitely precise diameter.
Measure only the empty inside of the ring at its widest point. Even a small metal-edge measurement error can change the recommended size.
Check with the calibrated sizer
Recommended next step
Shop with US size 12.75 already in the search.
Skip generic results. These searches are pre-filled for the size you just measured or converted.
Shop all rings in US size 12.75Amazon results filtered by your size
Engagement ringsUS size 12.75
Wedding bandsUS size 12.75
Physical ring sizerConfirm before an important purchase
As an Amazon Associate, RingSize.app earns from qualifying purchases. Prices are unchanged for you.