EU Shirt Size to UK Collar Size Converter
Instantly convert European (EU) shirt sizes to UK collar sizes in inches. Accurate, free sizing calculator for men’s dress shirts and formal wear.
Calculate Your Collar Size
Enter the European (EU) shirt size below to get an instant, precise conversion to UK collar size (inches), along with a general letter size equivalent.
Size Converter
Enter the EU size to see the UK collar equivalent
Typically ranges from 36 to 48 for men’s dress shirts
Helps provide a more accurate general letter size estimate
Converted Size
Based on standard international sizing charts
EU to UK Shirt Size Reference Chart
Standard conversions for quick lookup when shopping for men’s formal shirts across European and UK retailers.
| EU Size | UK Collar Size (Inches) | General UK Letter Size | Neck Circumference (cm) |
|---|---|---|---|
| 36 | 14″ | XS | 36 cm |
| 37 | 14.5″ | XS / S | 37 cm |
| 38 | 15″ | S | 38 cm |
| 39 | 15.5″ | S / M | 39 cm |
| 40 | 16″ | M | 40 cm |
| 41 | 16.5″ | M / L | 41 cm |
| 42 | 17″ | L | 42 cm |
| 43 | 17.5″ | L / XL | 43 cm |
| 44 | 18″ | XL | 44 cm |
| 45 | 18.5″ | XL / XXL | 45 cm |
| 46 | 19″ | XXL | 46 cm |
Shirt Size Conversion FAQ
Everything you need to know about converting EU shirt sizes to UK collar sizes and getting the perfect fit.
To convert an EU shirt size to a UK collar size, divide the EU size by 2 and then subtract 4. For example, an EU size 40 divided by 2 is 20, minus 4 equals a UK collar size of 16 inches.
An EU size 42 shirt corresponds to a UK collar size of 17 inches. In general letter sizing, this is typically considered a Large (L), though this can vary slightly depending on the brand and the cut of the shirt.
Wrap a soft measuring tape around the base of your neck, exactly where a shirt collar would naturally sit. Keep the tape snug but not tight, and allow room for one finger to fit comfortably between the tape and your neck. The measurement in inches is your true UK collar size.
They do not run smaller; they simply use different units of measurement. EU shirt sizes are based on neck circumference in centimetres, while UK sizes use inches. For example, a 40 cm neck (EU 40) is exactly 15.75 inches, which rounds to the standard UK half-size of 16 inches.