Ring Size Converter

Convert ring size between Korean, US, UK, EU, circumference, and diameter values.

Note: Ring fit depends on band width, finger swelling, season, and brand. Confirm with a jeweler before purchase.

When to use?

Use it when buying rings online or comparing international ring-size charts.

Enter known size, inner diameter, or inner circumference where available.

It converts using common ring-size reference tables and circumference/diameter relationships.

Online ring shopping - Compare Korean and overseas ring sizes.
Measure existing rings - Use inner diameter or circumference as a reference.
Gift planning - Estimate size before confirming with a jeweler.

This is an estimate for everyday planning. Actual results can vary by environment, product specifications, personal condition, and local rules.

Ring size is usually derived from the inner diameter or inner circumference. Measure the inside of an existing ring for a better estimate.

Finger swelling, season, time of day, and band width can change fit. Wider rings often need slightly more room.

No, even small differences can affect fit.

Yes, wider bands often feel tighter.

Yes, enter inner diameter if you measured an existing ring.

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