Levi's is the house that the 501 built—button ... The fit is somewhere between a 505 and 550, but it's made with a ton of stretch. It doesn't have the crisp and hard feel we want from denim.

Despite having a stronger taper than the 501, the 505 has a touch more room in the seat and thigh, and Levi’s also makes them with stretch, though you can still find them in a rigid selvedge ...

505 and so forth. The list goes on, which can make it tricky to decipher which Levi’s jeans number is right for you. (Are you a 512 man, or more of a 526? How does one even know?) And with even ...