In the beginning, there was one: the 501. Over the past century and a half, Levi’s jeans have become a favorite of miners, laborers, rock stars, fashion designers and practically everyone in-between.

A new data infrastructure helped Levi’s crunch the numbers on how everyone—not just the TikTok set—might want to go looser ...

All Levi’s jeans follow a similar naming sequence ... all Levi’s fits are denoted by a number: 501, 505 and 511, among others. Each number denotes a cut designed for a specific style and ...