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Fit Reference

Size Guide

We unify measurements for rings, bracelets, and necklaces in a single guide with conversion charts, visual references, and a thread measurement method in video.

Rings · International Conversion

Ring sizes by inner diameter with Mexico, US, EU (ISO) and Japan (JIS) equivalents
Internal diameter (mm) MX US EU Japan
14.05 3 3 44 4
14.87 4 4 47 7
15.68 5 5 49 9
16.49 6 6 52 11
17.3 7 7 54 14
18.11 8 8 57 16
18.92 9 9 59 19
19.74 10 10 62 21
20.55 11 11 65 24
21.36 12 12 67 26
22.17 13 13 70 29

If you fall between two sizes, we suggest choosing the larger one to maintain thermal comfort and movement.

Fit reference

Ring size calculator

Measure a ring you already own or your finger with a string, and get the equivalent size in US, Mexico, EU and Japan. Everything runs in your browser; nothing is sent.

How do you want to measure?

Measure across the inside of the ring, from edge to edge, at its widest point — never the outer diameter.

Before you measure

  • Measure at the end of the day, when your fingers are at their largest.
  • Avoid measuring right after hot water, exercise or very cold temperatures: fingers change size.
  • The ring must pass over your knuckle; if it does not, size up.
  • If you fall between two sizes, choose the larger one.

Important

This calculator is an estimation aid and does not guarantee a perfect fit. Sizing rings are the only method aligned exactly with the standard, so we recommend a fitting before any high-value piece.

Sources

Conversions are based on public standards and charts:

Bracelets

ProfileSuggested range
Standard women17-19 cm
Standard men20-22 cm

For thick pieces, add +1 cm of clearance.

Necklaces

  • Short: 40-45 cm (base of neck).
  • Medium: 50-60 cm (upper sternum).
  • Long: 70-80 cm (editorial drop).

Choose length based on body proportion and the type of neckline you usually wear.

Visual Measurement Map

Use this reference to correctly locate the internal diameter of rings and the actual contour of your wrist.

Internal diameter Wrist contour + 1 cm Ring Bracelet

Thread Method (video)

Wrap the thread loosely around your finger, mark the meeting point, measure in millimeters, and compare with the table above.