The Fit Key - your personal sizing profile

Your Fit Key is a unique 5-character code that stores the measurements and fit preferences of your shirt or trousers, making future reorders simple and consistent.

How to create your first Fit Key with AI?

Simply enter your height, weight and age on the website. LE CHEMISEUR® AI calculates your optimal fit using data from more than 50,000 customers. Start by choosing a dress shirt and the website will guide you through the process.

Reordering with your Fit Key

Once you have your first Fit Key, reordering becomes simple and precise.

You can find your Fit Key:

• inside the collar of your shirt,
• or in your customer account.

If needed, you can adjust your fit before reordering. For example, you can add +1 cm to the chest.

Because your previous shirt serves as the reference, adjustments are easy and reliable.

Each updated fit generates a new Fit Key for future orders.

Updated on: 17/05/2026