Men's Shirt Size: Neck & Sleeve Guide
Find men's shirt size using neck, chest and sleeve measurements with US, UK and EU conversion advice plus links to clothing and suit converters.
Men's shirt sizing is more precise when you measure neck, chest and sleeve instead of relying only on S, M or L labels. Dress shirts often use neck and sleeve numbers, while casual shirts use regional clothing labels. Use the Clothing Size Converter to compare US, UK and EU shirt labels after measuring.
Measure Neck and Chest First
Wrap a soft tape around the base of your neck where the collar sits, leaving one finger of comfort space. Measure chest around the fullest part under the arms. These two numbers determine whether the shirt closes comfortably without pulling across the buttons.
Check Sleeve and Shoulder Fit
Sleeve length should reach the wrist bone when your arm is relaxed. The shoulder seam should sit at the edge of your natural shoulder, not down the upper arm. If you also need a blazer, use the Suit/Blazer Size Converter because jacket sizing follows a separate chest-based system.
Compare Fit Cuts Carefully
Slim fit, regular fit and relaxed fit can all share the same labeled size while fitting differently through the torso. If you are between sizes, prioritize neck comfort for dress shirts and chest comfort for casual shirts. Fabric stretch and shrinkage after washing should also influence your final choice.