> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://faq.lechemiseur.fr/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Fine-tuning your Fit Key over time

![Has your body shape changed? You can easily adjust your Fit Key before placing your next order.](https://lechemiseur.fr/data/lechemiseur/blog/mail-ajustement-image-ouverture-mesure.jpg =333x500)

### Step 1 : Log in and choose your Fit Key

Log in to [your account](https://lechemiseur.fr/en/my-account) and click **“Use this shirt as a starting point”**. Your previous shirt serves as the reference for future fit adjustments.

![The easiest way to reorder is to start from a previous shirt..](https://storage.crisp.chat/users/helpdesk/website/-/2/1/5/d/215d429d5477cc00/image_f2mmkh.png =524x250)

You can also find your Fit Key directly on the label inside your shirt or trousers:  

![Label with the Fit Key](https://storage.crisp.chat/users/helpdesk/website/-/2/1/5/d/215d429d5477cc00/incrustation-nom-etiquette-sou_9oykns.jpg =300x300)
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### Step 2: Choose your shirt and adjust your Fit Key

Slect your [shirt](https://lechemiseur.fr/eshop/chemise-homme), then go to the “Your Fit” section and click “Edit this Fit Key”.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/1/5/d/215d429d5477cc00/capture-decran-2026-09-07-1416_1kvgwpf.png =700x380)


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### Step 3 : Select the measurement you would like to adjust

Click on the measurement you would like to modify, for example the sleeve length.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/1/5/d/215d429d5477cc00/capture-decran-2026-09-07-1416_y2o9yo.png =800x822)
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### 📖  Step 4 : Follow the tutorial

Use the step-by-step images to guide you through the adjustment process.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/1/5/d/215d429d5477cc00/image_1gkt8j6.png)


|| Please make sure to adjust your measurements using a shirt that has already been washed 2–3 times. Alternatively, allow an extra 1 cm, as even premium fabrics may shrink slightly over time.

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### 📞  Need personalized advice?

Our made-to-measure specialists will be happy to help.
[Book a complimentary 30-minute video call](https://lechemiseur.fr/en/appointment) and show us your shirt during the appointment.