How do I pick a ring size when I am between sizes?

ZKZ Editorial TeamMain answer · Product & gemmology desk

Choose by comfort and security, not by the smaller number. A ring that is slightly loose can be fixed with a guard, while one that is too tight is uncomfortable and hard to adjust. For wide bands and warm climates, the larger size is often safer.

What to weigh

1. Band width: wide bands feel tighter, which favours the larger size.
2. Knuckle size: the ring must pass the knuckle, so a large knuckle favours the larger size.
3. Climate and activity: fingers swell in heat, which favours the larger size.
4. Purpose: an everyday ring needs to be secure but comfortable.
5. Design: pieces with stones or detailed settings are harder to resize later.

A practical rule

Our advice If you are torn, choose the larger size for a wide or stone-all-round ring, and the smaller size for a thin, plain band you can resize or add a guard to. When the ring will be hard to alter, lean to comfort.

Try before you decide

• Test with a ring of similar width, if possible
• Wear it for an evening to see how it feels
• Check how it sits after exercise or in warm weather

Fixing small differences

• Ring guards or beads for a slightly loose ring
• Resizing for plain bands
• A half-size exchange if the seller offers one

It depends What works depends on your finger shape. A tapered finger can need a different size from a straight one, even at the same measurement.

If the ring is a gift

Our advice Choose the larger size if you must guess, and make sure the recipient knows how to exchange it. A ring that is too small cannot be worn at all; one that is slightly large can still be used while it is adjusted.

A last check

Our advice Ask yourself which mistake would be worse: a ring that spins a little or one that will not pass the knuckle. For most wearers, a ring that is slightly loose is the easier problem to live with and to fix.

Uncertain We cannot choose the right size for your finger. A jeweller's fitting is the most reliable way to decide.

Related reading: What ring size should I buy for a surprise gift? · Lab Grown Diamond Necklaces: Styles, Sizes and How to Choose

Sources

No external standard governs this question, so this answer is editorial advice from the ZKZ team and is labelled that way.

Fact = stated by the cited source. Our advice = editorial recommendation. Uncertain / it depends = limits of what can be said in general.