How to convert tops sizes
Tops size conversion chart
Letter sizes (XS–XXL) mapped to chest measurements in centimetres and inches for shirts, t-shirts and blouses.
| Size | Chest (cm) | Chest (in) |
|---|---|---|
| XS | 81–86 | 32–34 |
| S | 89–94 | 35–37 |
| M | 97–102 | 38–40 |
| L | 104–109 | 41–43 |
| XL | 112–117 | 44–46 |
| XXL | 119–124 | 47–49 |
Ranges are typical; every label uses its own grading, so treat the numbers as a guide and check the garment measurements when you can.
Why a letter size is not a measurement
An “M” tells you almost nothing by itself: every brand grades its medium differently, and the same letter can cover a range of chest sizes. Tops sizing becomes reliable only once the letter is tied to a real measurement — the chest circumference — which is what this converter does.
How to use this tops size converter
Choose “letter size” and the matching chest range appears, or type your chest measurement in centimetres or inches and the closest letter is returned. The full chart shows every letter with its range so you can compare at a glance.
How to measure your chest correctly
Wrap a tape measure around the fullest part of your chest, keeping it level under the arms and snug but not tight. Breathe normally, and round to the nearest centimetre or half inch.
Tips for choosing a top size online
If a garment fits you well already, compare its flat chest measurement with the chart rather than relying on the letter. Looser fits need a size up; fitted tops often a size down from your usual casual size.
Frequently asked questions
How do I convert letter sizes to chest measurements?
Read your chest measurement against the chart: each letter covers a band (for example a typical M spans 96–101 cm). Pick the letter whose range contains your measurement, or the closest range when you are between two sizes.
Is an XS in one brand the same as an XS in another?
No — sizing is not standardised. The ranges shown are a widely used starting point, but brands shift their grading up or down, so comparing the actual chest measurement matters more than the letter.
Should I use centimetres or inches?
Use whichever you measured in — the converter accepts both and they refer to the same ranges. Just do not mix a centimetre reading into the inches field.
What if I am between two sizes?
It depends on the fit you want. Between sizes, choose the larger for a relaxed or layered fit, or the smaller for a close, tailored look. When in doubt, the chest measurement decides.
Does this chart work for men and women?
Women’s tops are cut differently from men’s and use their own letter ranges, so the numbers here are a generic guide. Where possible, prefer a brand’s gender-specific chart for an accurate fit.