A little more about "bike fit." This is a lot more than the size of the bike or the stand-over height. It has to do with the proportion of your body - leg length vs torso length, flexibility, purpose of riding, other body measurements and a bunch of other stuff. In fact, stand-over height is likely the least important measurement. The saddle also is important - the width to support the ischial tuberosities (AKA "sit bones"), the shape to prevent perineal damage, etc. A good LBS can be invaluable in these areas.