Adjusting the back length of a shirt
The Ideal Shirt Length
The ideal shirt length depends on your body shape, your height and how you intend to wear your shirt.
Casual Shirt, worn untucked: | Formal Shirt, worn tucked in: |
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A casual shirt, worn untucked, should cover your stomach even when you raise your arms. It should not be too long either to avoid the "skirt effect". On the side, it extends about 10 cm below the belt. At the front, it reaches the middle of the fly. | A formal shirt must be long enough to stay tucked in when you move. On the side, the shirt should extend about 17 cm below the belt. At the back, the shirt should reach the base of the buttocks and at the front towards the bottom of the fly. |
LE CHEMISEUR® tips
🤏 Allow for shrinkage
We recommend washing your shirt two or three times before deciding whether any length adjustment is necessary.
Alternatively, you may choose to add 1 or 2 cm to the shirt length if you prefer a longer fit.
Our AI already takes the expected shrinkage of each fabric into account when calculating your measurements.
📏 Adjusting for height
Taller customers sometimes prefer a slightly longer shirt for more balanced proportions.
Shorter customers may prefer a slightly shorter shirt to maintain visual balance and avoid shortening the appearance of the legs.
🐘 Prominent stomach
If you usually wear your shirt tucked in, a slightly longer shirt can help it stay comfortably in place throughout the day.
For collar sizes of 48 cm and above, you automatically benefit from our Big-&-Tall pattern, which provides additional length at the front for a given back length.
🔀 Back length and hip width link
How to measure back length on a shirt
Tolerance: A difference of ±1 cm between your measurement and your Clé de Coupe (Fit Key) is completely normal and falls within our manufacturing tolerances.
Updated on: 10/06/2026