Men's jacket size from chest measurement
Measure around the fullest part of your chest under the arms, then enter it to find the jacket size to start from.
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How to use it
- Enter chest measurement and unit.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Chest in inches = cm ÷ 2.54. US size = the nearest even number to the chest in inches (halfway rounds up). EU size = US + 10.
Example
Inputs: Chest measurement = 106, Unit = cm. Result: US and UK size: 42; EU and Italian size: 52; Chest in inches: 41.73 in.
Limits and caveats
- Treat the result as a starting point: slim or loose cuts may need one size down or up.
- Some brands sell odd sizes like 39 and 41; this tool gives the nearest even size.
Questions about this tool
How do I measure my chest for a suit?
Wrap the tape around the fullest part of the chest under the arms, arms relaxed, without pulling it tight.
My chest is 41 in, do I pick 40 or 42?
At the halfway point the tool gives the larger 42, the usual advice so the jacket closes comfortably.
Is the jacket size equal to my chest?
The US number refers to the body chest in inches; the jacket itself is cut several inches larger.