Yeah, it really depends on geometry.

My custom road bike is a measured 47 cm c-c and a perfect fit. My off-the-shelf road bike is a nominal 50 cm, and probably pretty close to that center-to-top; a decent fit. My hybrid is 13" and definitely too big for me - even though it's a step-through frame and sold as a women's bike, it's not really built with a short reach.