>>2047717
in contrast, this is a bike that fits somebody around 6'3".
using the size chart I posted will let you know, but this is just an easy way to narrow down all the choices.
modern bikes have sloping top tubes but they all have the frame size written on them, you want S, of course. the older bikes are sized like shoes in small increments, you probably want something around 50-52cm I'd guess. but they don't write it on the frame, you have to measure but it's easier to just straddle it. most sellers don't know the size, but if they do list it, then that's what you're shooting for but you won't know until you try a few. there's lots of size charts online but they all differ slightly so straddling them is the only way to be sure