I just bought my first bike in many years. I'm 5'11" with a 32" inseam and the bike I bought is a vintage road bike with a 61cm seat tube measured from center of bb to center of tt. Is it too big? Probably. But I can "stand over" it without making changes in my family planning so I'll ride it and enjoy it. The thing with vintage bikes I've found is that you can't always get what you want. But you get what you need.