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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Subtract the case size of the timepiece from your wrist measurement
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Enquire about Jacob & Co. Buggatti Chiron Complication Watch BU200.40.AA.AA.BBRUA
Details
| Vendor | Jacob & Co |
| Metal | 18ct Rose Gold |
Read more information regarding our Product Disclaimers.
Product Details
The exterior shape of the Bugatti Chiron exudes power and performance. Jacob & Co. took inspiration from this sculpture to create the case of the Bugatti Chiron Tourbillon.
The case is a glass and metal volume whose structural elements echo the Chiron's unique design in the signature horseshoe Bugatti grille, the quarter glass, the muscular bodywork, and the haunting headlights. Jacob & Co. reinterpreted it all with a unique sense of design and exhilaration all the way down to the movement, visible through seven sapphire panels.
Its automaton is a direct reference to Bugatti’s W16 engine block. Its power reserve is shaped like a fuel gauge, its tourbillon carriage like a radiator, and its structure like exhaust pipes.
Limited edition 72 pieces
























