Sahih Muslim Book 30, Hadith Number 5771.

Chapter : Concerning the characteristic features of Allah’s Apostle (may peace be upon him), and he was the most handsome of the people.

Al-Bara’ reported: Never did I see anyone more handsome than Allah’s Apostle (may peace be upon him) in the red mantle. His hair had been hanging down on the shoulders and his shoulders were very broad, and he was neither very tall nor short-statured. Ibn Kuraib said he had hair.