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 Breitling Premier B15 Duograph 42mm Watch AB1510171C1P1
Details
| Vendor | Breitling |
| Metal | Stainless Steel |
| Case Diameter |
Product Details
Paying homage to three generations of inventors – Léon, Gaston & Willy Breitling – the Premier Duograph displays Breitling’s watchmaking expertise with its split second complication. As Willy Breitling said, the Premier is an “unmistakable stamp of impeccable taste”.
This latest generation of Breitling Premier chronographs brings its timeless elegance back to life, and showcases Breitling’s highest level of watchmaking thanks to a range of iconic Breitling Premier complications: the Chronograph, the Duograph and the Datora. Featuring rectangular chronograph pushers, bi-compax chronograph look and Arabic numerals, the heritage-revived Breitling Premier chronographs display a variety of elegant design details such as grooves on the case-sides, open sapphire casebacks and vintage-inspired hands.
The Breitling Premier Duograph comes in two variations: in stainless steel with a blue dial and a gold brown alligator strap or in 18k red gold with a black dial and a black alligator strap. “Duograph” was a term used by Breitling in the 1940s and refers to a “chronograph rattrapante". A rattrapante (from the French “rattraper” – to catch up) is one of the most elaborate of all watch complications. In terms of manufacturing difficulty, it’s on a par with the tourbillon and minute repeater. Its function is to measure two elapsed times at once (intermediate and split time), which it shows via two hands on the central chronograph. The Breitling Premier Duograph is powered by the manually wound cosc-certified Breitling Manufacture Caliber B15, featuring two patented innovations: one to simplify the mechanism and the other to improve accuracy.































