How shirt size conversion works
Shirt sizes can be shown as letter labels, EU numbers, UK labels, or Asia chest-based labels. This converter uses a local chart aligned to common public shirt and top ranges to estimate the closest equivalent and shows chest, collar, and sleeve references where available.
Treat the result as a starting point for online shopping. The chart uses representative body-measurement points, not a live brand database. The final fit still depends on cut, fabric, shoulder width, sleeve length, and the brand's own size chart.
- Letter sizes are useful for casual shirts, polos, and T-shirts.
- EU and UK labels are common on dress shirts and international stores.
- Asia labels often track chest centimeters and may fit closer than Western charts.
Measurements that matter most
Chest
The most important shirt measurement. A shirt should not pull across the chest when you move your arms.
Collar
For men's dress shirts, the collar should close comfortably with about one finger of space.
Sleeve
Long sleeves should reach the wrist without covering the hand or pulling when your arm bends.
Common shirt sizing systems
| System | Typical use | Best check |
|---|---|---|
| Letter | Casual shirts, T-shirts, polos, hoodies | Chest width and intended fit |
| EU | European dress shirts and fashion labels | Chest and collar chart |
| UK | UK retailers and formalwear | Collar, chest, and sleeve |
| Asia | Stores that list chest-centimeter labels | Garment measurements and reviews |
Simple fit workflow
- Convert the size label to get a starting equivalent.
- Measure a shirt that fits you well across the chest and from shoulder to hem.
- Compare those garment measurements with the retailer's chart.
- Check the fit label: slim, regular, relaxed, oversized, or stretch.
- If between sizes, choose based on desired fit and fabric shrinkage risk.
Frequently Asked Questions
Can a shirt converter replace a brand size chart?
No. It gives a chart-based equivalent, but brand-specific measurements and fit labels are still the final source for buying decisions.
Why do I wear different shirt sizes at different stores?
Brands use different fit models, fabrics, and grading rules. A Medium can be slim in one brand and relaxed in another.
What should I do if I am between shirt sizes?
Size up for a relaxed fit, layering, or possible shrinkage. Stay smaller only when the fabric has stretch and you prefer a closer fit.
Are Asia shirt sizes smaller?
They can be closer-fitting than Western charts. Check the chest measurement in centimeters instead of relying only on the label.
Which measurement should I trust most?
For most shirts, chest is the first check. For dress shirts, collar and sleeve length also matter.