Anas bin Malik (Radiallhu Anhu) reports, "Rasullullah (Sallallahu alaihe wasallam) was of a medium stature, he was neither very tall nor very short. He was very handsome, of medium built and his hair was neither very curly nor very straight (but was slightly wavy). He had a wheat-coloured complexion. When he walked, he leaned forward slightly".
Arabic/English book reference: Book 1, Hadith 2