Been thinking about bibs myself, would like something to keep things in place better as my shorts slip down when I stand up so I tend not to stand up as often as I'd like, just not sure about fitting them.

How do you determine the size? I don't want to go in and try on something and find I'm stretching them too much to put them on. Do you go with basically the shorts size and usually the bib part ends up being long enough to fit?