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 Breitling Navitimer B01 Chronograph 43mm Watch AB0138241K1A1
Details
| Vendor | Breitling |
| Metal | Stainless Steel |
Read more information regarding our Product Disclaimers.
Product Details
There have been many iterations of Breitling’s icon since its debut 70 years ago, but this new Breitling Navitimer captures its most classic features, while enhancing them with modern refinements. A flattened slide rule and a domed crystal create the illusion of a sleeker profile. Alternating polished and brushed metal elements give a lustrous, yet understated finish. Most notably, the Breitling Navitimer's new colours in shades of blue, green and copper, define the updated dial options. And if there is one update sure to spark nostalgia, it’s the return of the AOPA wings to their original position at 12 o’clock.
For 70 years, the Breitling Navitimer has been beloved by aviators and tastemakers in equal measure. Worn by astronauts in space and the biggest stars on earth, it is Breitling’s most iconic timepiece and one of the most recognizable watches of all time.



































