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 |

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Enquire about VAULT® 7.44 carat Yellow Diamond and 1.04 carat Diamond Ring in 18ct Yellow and White Gold
Product Description
Radiating warmth and structured brilliance, this Vault® ring is centred on a captivating radiant-cut yellow diamond, its sunlit hue intensified by a classic claw setting that invites light through every facet. Flanked by precisely cut trapezoid diamonds, the composition forms a refined geometric trilogy, their crisp white tones sharpening the golden centre stone’s glow. The 18ct white gold band, polished to a mirror finish, provides a seamless and architectural foundation that enhances the ring’s symmetry and presence.
Only one in every 10,000 diamonds possesses a natural fancy colour, representing just 0.01% of total global diamond production. Formed deep within the earth up to billions of years ago, these extraordinary gems are among the rarest and most valuable in the world. Their remarkable scarcity elevates the significance of the yellow diamonds featured in this design, imbuing the earrings with both prestige and enduring allure.

































