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John Hardy Surf Ring – Dome in Silver with Blue Sapphire – Size 7
Balinese for “origin,” John Hardy Surf offers an exaggerated and modernized approach to the iconic Classic Chain. Inspired by the meandering movement of weaving and the art of connectivity, amplified links are intricately carved for all over dimensionality. Ring measures 3.5mm to 7.5mm wide.
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John Hardy Ring Size Guide
Ring sizes are based on the circumference of your finger. Measure first, then match your measurement to the chart below.
Size chart
| US · Canada | UK · Australia | Finger circumference (cm) | Finger circumference | Finger circumference (mm) | Size on this site |
|---|---|---|---|---|---|
| 5 | J ½ | 4.93 | 4.93 | 49.3 | 5" |
| 6 | M | 5.18 | 5.18 | 51.8 | 6" |
| 7 | O | 5.44 | 5.44 | 54.4 | 7" |
| 8 | Q | 5.69 | 5.69 | 56.9 | 8" |
| 9 | S | 5.94 | 5.94 | 59.4 | 9" |
| 10 | T ½ | 6.20 | 6.20 | 62.0 | 10" |
| 11 | V ½ | 6.45 | 6.45 | 64.5 | 11" |
| 12 | Y | 6.73 | 6.73 | 67.3 | |
How to measure your finger
Make sure the string is pulled snug (the tighter the better) to find your best fit.

With a pen or your other hand, mark where the string meets. Make sure it is pulled snug.

Lay your string against a ruler and measure the length (cm). This number is your finger circumference. Compare it to our size chart to find which size is right for you.











