| Length |
Back collar seam down to the bottom hem |
28–32 inches typical; 26–28 for short shirts |
| Shoulder |
One shoulder seam across to the other (upper back) |
Most critical measurement — defines the overall fit |
| Sleeve Length |
Shoulder seam, over the bent elbow, to the wrist |
Measure with arm bent at 90°; 32–36 inches typical |
| Sleeve Width |
Fullest part of the upper arm (bicep) |
Add 2 inches ease for a comfortable fit |
| Chest |
Fullest part of the chest, tape horizontal |
Formal shirts add 4 inches ease; fitted styles add 2 |
| Side Loose |
Extra ease added at each side seam |
1.5 inches per side for regular fit; 1 for slim fit |
| Regal Loose |
Extra ease in the back panel |
Allows shoulder movement without the shirt pulling forward |
| Collar |
Neck circumference at the collar point |
Add 1 inch to actual measurement for collar gap |
| Cuff Width |
Wrist circumference where cuff will close |
Add 1 inch; French cuffs may need 0.5 inch more |
| Pocket Size |
Width of the chest pocket opening |
Standard dress shirt pocket is 4 × 4.5 inches |
| Cuff Model |
Style of cuff (barrel, French, sport) |
Barrel for everyday; French for formal with cufflinks |