Sunan an-Nasa'i Book 48, Hadith 22
"The hair of the Messenger of Allah came halfway down his ears."
"I have never seen anyone who looked more handsome in a red Hullah than the Messenger of Allah , with his long hair that came down to his shoulders."
"I have never seen any man more handsome in a red Hullah than the Messenger of Allah ." He said: "And I saw his long hair, coming almost to his shoulders."