UK Men’s Shirt Size To EU Converter
Convert UK men’s shirt collar sizes into EU centimetre collar labels, with fit checks for chest, sleeve length, cut and shrinkage.
Convert Shirt Size
EU Shirt Size Result
The result converts the UK collar in inches to an EU centimetre collar label.
What Makes This Result Specific
UK Collar Inches And EU Shirt Centimetres
UK men’s formal shirts are often sold by collar size in inches, such as 15, 15.5 or 16. EU shirt labels often use centimetres, such as 38, 39, 40 or 41. The conversion is simple arithmetic: inches multiplied by 2.54. A UK 15.5 inch collar is about 39.4 cm, so it is usually sold as EU 39 or EU 40 depending on the brand and rounding.
Collar size is only one part of shirt fit. Chest, waist, shoulder width, sleeve length, back length and cut all matter. A regular 15.5 shirt and a slim 15.5 shirt may have the same collar but very different body measurements. Dress shirts worn with a tie need enough collar room to fasten comfortably. Casual shirts can tolerate more looseness at the neck if they are worn open.
UK Men’s Shirt Size To EU Table
| UK Collar | Approximate cm | Common EU Label | Fit Note |
|---|---|---|---|
| 14 in | 35.6 cm | EU 36 | Small collar range. |
| 14.5 in | 36.8 cm | EU 37 | Often small or extra small body label. |
| 15 in | 38.1 cm | EU 38 | Common small/medium collar. |
| 15.5 in | 39.4 cm | EU 39 or 40 | Brand rounding matters. |
| 16 in | 40.6 cm | EU 41 | Common medium collar. |
| 16.5 in | 41.9 cm | EU 42 | Check sleeve length. |
| 17 in | 43.2 cm | EU 43 | Common large collar. |
| 17.5 in | 44.5 cm | EU 44 or 45 | Brand rounding varies. |
| 18 in | 45.7 cm | EU 46 | Check chest and waist. |
| 18.5 in | 47.0 cm | EU 47 | Large range. |
| 19 in | 48.3 cm | EU 48 | Specialist fit may be needed. |
How To Measure Neck And Sleeve
Measure around the base of the neck where the collar sits. Put one finger under the tape for a dress shirt if you want tie comfort. The tape should be level, not tight. If the result is between sizes, decide from the use: a formal shirt with tie usually needs a little room, while an open casual shirt may be chosen more by chest and shoulder fit.
Sleeve length can be hidden by collar conversion. A tall wearer may need a longer sleeve even when the EU collar is correct. A shorter wearer may need sleeve alterations. Check whether the retailer offers sleeve lengths, regular/long options or only one body block. For slim shirts, chest and waist can be more restrictive than the collar.
Worked Shirt Examples
| Case | UK Input | EU Result | Next Check |
|---|---|---|---|
| Business shirt | 15.5 in collar. | EU 39 or 40. | Check tie comfort and sleeve length. |
| Formal dress shirt | 16 in collar. | EU 41. | Check chest, cuff and collar with tie. |
| Slim-fit shirt | 17 in collar. | EU 43. | Body may be tight even if collar fits. |
| Casual overshirt | 16.5 in collar. | EU 42. | Chest layering may matter more than collar. |
Collar Label, Body Cut And Sleeve Choices
A shirt conversion from inches to centimetres answers the collar label only. It does not tell you whether the chest, waist, shoulder or sleeve will be right. Formal shirts are often sold by collar number first because the collar must fasten cleanly with a tie. Casual shirts and overshirts are more often judged by chest and shoulder room. If you are between two collar labels, think about how the shirt will be worn: tied at the neck, open at the collar, under a jacket, over a T-shirt or as a light layer.
Sleeve length can change the buying decision even when the EU collar is perfect. Some brands sell regular and long sleeves; others use one sleeve length for each collar. Measure from the centre back of the neck, over the shoulder and down to the wrist, or compare with a shirt that already works. Cuff width also matters for watches. If a dress shirt will be worn with cufflinks, check double-cuff options rather than treating the collar conversion as the whole size.
Body cut is the other large difference. A slim EU 41 and a regular EU 41 can share the same collar but differ by several centimetres at the chest and waist. A tailored fit may narrow the waist without reducing the chest as much. If the shirt pulls between buttons when seated, the collar conversion was not the problem; the body block was.
Buying From EU Retailers
Look for centimetre collar size, body fit, sleeve length, chest and waist measurements. Some EU shops use S, M, L and XL rather than collar numbers; in that case, use the retailer chart rather than forcing a collar conversion. Wash shrinkage also matters for cotton shirts. If the collar is perfect before washing and the shirt is not pre-shrunk, read the care label before removing tags.
Check whether the EU retailer measures the shirt body flat or gives body measurements. A flat chest number must be doubled before it can be compared with body chest size, and it still needs wearing ease. For tailored shirts, also compare shoulder width, because a correct collar with a narrow shoulder can pull across the upper sleeve.
FAQs
What is UK shirt size 15.5 in EU?
15.5 inches is about 39.4 cm, so it is commonly sold as EU 39 or EU 40 depending on brand rounding.
What is UK 16 collar in EU?
UK 16 inches is about 40.6 cm, commonly labelled EU 41.
Do UK and EU shirt sizes only refer to collar?
Formal shirt labels often start with collar, but chest, waist, shoulder and sleeve length still affect fit.
Should I round up or down?
For a tie, round toward comfort. For an open casual shirt, body fit may matter more than collar fit.
Can I use this for T-shirts?
No. T-shirts usually use chest and letter sizing, not collar sizes.
Does slim fit change the collar conversion?
No. The collar conversion is the same, but the shirt body will be narrower.
Sources
- British Standards Institution. (n.d.). BS EN 13402 Size Designation of Clothes. BSI. https://knowledge.bsigroup.com/
- UK Fashion and Textile Association. (n.d.). Clothing Sizing Guidance. UKFT. https://www.ukft.org/
- International Organization for Standardization. (n.d.). Size Designation of Clothes. ISO. https://www.iso.org/