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Ring Size Converter
Convert ring sizes between US, UK, and EU scales and view the matching inner diameter and circumference in millimetres.
How to use this tool
- Choose the sizing system you already know and select your size.
- Review matching values across US, UK, EU, diameter, and circumference.
- Copy or download the conversion summary for customer support or ordering.
Jewellery team uses
- Translate customer sizes between local and store-standard systems.
- Prepare printable references for in-store fittings and remote consultations.
- Reduce returns by cross-checking regional size labels with metric values.
Measurement tips
- Measure fingers later in the day when they are slightly larger.
- If you are between sizes, choosing the larger ring is often safer.
- Use inner diameter from an existing ring for consistent results.
FAQ
- How precise are these conversions?
- They follow common international charts, but brand tolerances can vary slightly.
- What if my exact size is not listed?
- Choose the nearest measurement and confirm final fit with a jeweler for fine adjustments.
- Can this be extended for more regions?
- Yes. Additional systems can be added by extending the ring size dataset and labels.
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