Stylish yet elegant, the modern-retro inspired Chronomat Automatic 36 is the versatile sporty and chic watch for any occasion. It is available in an array of metal cases, from cool stainless steel, to goes-with-everything bicolour, or even luxurious 18k red gold. Women craving extra sparkle will also be able to opt for diamond-set bezels, indices, and colourful dials. Featuring Breitling’s iconic and comfortable “Rouleaux” bracelet with a butterfly clasp, the Chronomat Automatic 36 is powered by the Breitling Caliber 10, a COSC-certified chronometer.
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 |

This timepiece sizing guide is the combined length of the two straps. To determine the length of your watch band, follow the below.
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Cut out the length chart
Cut out the length chart
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Measure your wrist
Measure your wrist
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Subtract the case size of the timepiece from your wrist measurement
Subtract the case size of the timepiece from your wrist measurement
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Be sure to print this guide at 100%
Measure this box to check accuracy


Ask about Breitling Chronomat Automatic 36mm Watch U10380591A2U1