If you want a quick easy to use reference, check out the fitting quide at the colorado cyclists webpage I think it's
www.coloradocyclist.com. You'll have to measure your inseam, which is hard to do by yourself, get you significant other to give you a hand.
L8R G8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger