US 5.5 to UK Ring Size
Conversion
US 5.5 = UK K
Inner circumference ≈ 50.6 mm · diameter ≈ 16.1 mm.
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Full conversion chart
| Region | Size |
|---|---|
| US | 5.5 |
| UK | K |
| EU | 50 |
| France | 50 |
| Japan | 10 |
About this conversion
A US 5.5 ring converts to a UK K. Inner circumference ≈ 50.6 mm · diameter ≈ 16.1 mm. Ring sizes all describe one physical measurement — the inner circumference of the band — that each country labels differently.
To check at home, measure the inside diameter of a ring that already fits and compare it to the millimetre figure above.