These days, the two terms are often used interchangeably, but they’re not the same thing. Some brands will even wrongly use the term button-down to refer to a button-up shirt, with the most egregious ...

I have more than a few button-up shirts in my closet and strong opinions about what makes a good one. For the 2024 edition of this guide, I tested 21 button-up shirts.

Ahead, the best button-up white shirts—from tried-and-true tailoring brands like Ralph Lauren and J.Crew to modern shirting startups like Alex Mill and Grayson—for every fit, style and price.