Sahih Muslim
The Book Pertaining to the Excellent Qualities of the Holy Prophet (may Peace be upon them) and His Companions (Kitab Al-Fadail)
Book Number: 030 / Hadith Number: 5770
Al-Bara' reported that Allah's Messenger (may peace be upon him) was of medium height, having broad shoulders, with his hair hanging down on the lobes of his ears. He put on a red mantle over him, and never have I seen anyone more handsome than Allah's Apostle (may peace be upon him).