Let's get straight to it — here's what actually matters on this one.

• For tucked-in shirts, the hem should reach mid-fly to seat level — long enough to stay tucked through a full day of movement.
• For untucked wear, the hem should land at or just below the top of your zipper, not lower — anything past mid-hip reads as ill-fitting.
• The 'raise your arms' test: reach overhead — if your shirt fully untucks or rides up to expose skin, it's too short for tucked wear.
• A shirt that constantly needs re-tucking has usually been rubbing at the waistband all day, a common source of unnoticed irritation.

The fit-and-fabric-health takeaway: Correct length keeps fabric from bunching at the waist — bunched fabric traps heat and moisture right where skin already sweats most.

Next up: check out our guide on how to know if your blazer fits perfectly.