The denim shirt has a credibility problem that comes entirely from fit. Too boxy and it reads like workwear from a bad decade. Too long and it bunches under a jacket in a way that immediately reads sloppy. The cut is everything here and it’s also where most of the options on the market fall short. What we’ve been looking for specifically are shirts that sit right when worn open over a tee, tuck cleanly when the occasion calls for it, and sit under a blazer without adding bulk through the shoulders. The fabric weight matters too. Thin denim pills and loses its color fast. The better versions use a mid to heavier weight that softens with washing rather than degrading. Chambray has its place but this is about actual denim, the kind that develops with wear. These are the long sleeve options we’d actually reach for, cut by people who clearly thought about how men wear them in practice.