Size Guide
Choosing the perfect ring size is an essential part of the Hardy Brothers experience.
Our guide below will help you find the most accurate fit, ensuring comfort, elegance, and a seamless expression of luxury.
| Australian Size | Inside Circumference (mm) |
|---|---|
| H | 46.0 |
| H ½ | 46.6 |
| I | 47.2 |
| I ½ | 47.9 |
| J | 48.3 |
| J ½ | 49.3 |
| K | 49.6 |
| K ½ | 50.3 |
| L | 50.5 |
| L ½ | 51.5 |
| M | 51.8 |
| M ½ | 52.5 |
| N | 53.1 |
| N ½ | 53.8 |
| O | 54.5 |
| O ½ | 54.8 |
| P | 55.7 |
| P ½ | 56.4 |
| Q | 57.1 |
| Q ½ | 57.6 |
| R | 58.4 |
| R ½ | 59.1 |
For the most precise fit, we invite you to visit a Hardy Brothers boutique where our specialists will personally measure your finger and ensure your chosen piece is crafted to perfection.

Hardy Brothers uses standard Australian ring sizes.
| Australian Size | Inside Circumference(mm) |
| M 1/2 | 55.7 |
| N | 57.0 |
| N 1/2 | 58.3 |
| O | 59.6 |
| O 1/2 | 60.9 |
| P | 62.2 |
| P 1/2 | 63.5 |

Cut out the length chart
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Subtract the case size of the timepiece from your wrist measurement
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Enquire about Vault® 3.31 Carat Fancy Yellow Diamond and 0.24 Carat Round Brilliant Cut Diamond Ring in 18ct White Gold
Product Description
Radiating bold colour, the Vault® 3.31 Carat Fancy Yellow Diamond and 0.24 Carat Round Brilliant Cut Diamond Ring in 18ct White Gold elevates everyday elegance with a bold yet graceful presence. At its centre rests a 3.31 carat natural fancy yellow round-cornered square modified brilliant diamond, selected for its striking colour and exceptional radiance.
Cradled by 18ct yellow gold claws that enhance its warm, luminous hue, the centre stone is beautifully set upon a sleek band of 18ct white gold, where 0.25 carats of natural H‑colour, Si2‑clarity round brilliant diamonds are meticulously set to create a shimmering contrast that accentuates the vivid yellow centre.




























