Measure inner leg and do this: http://www.ebicycles.com/bicycle-tools/frame-sizer/road-bike
it'll give you an accurate reading, but i'm 5ft9ish and it's done me well.
@D.Cooper started
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Measure inner leg and do this: http://www.ebicycles.com/bicycle-tools/frame-sizer/road-bike
it'll give you an accurate reading, but i'm 5ft9ish and it's done me well.