What I learned as I researched is that it’s quite tough to pick the “best” white T-shirt — there’s just as much of a case for a structured boxy tee as there is for a plain cotton Hanes.

For a twist on tailoring, style Madewell’s boxy tee with a pair of pleated khakis. No longer just a staple of your weekend wardrobe, a plain white tee is the ultimate everyday (and night ...