Not sure if it's been said, but everyone is the same size lying down/in bed. One of my ex's was 5'11 (I'm 6ft) and my ex wife is 5'2. Someone I'm kind of seeing is about 5'4. Don't stress over it.
having said that, I've always had a thing for tall girls. With long legs. Long, shapely, toned legs. Ahem.