Ash-Shama'il Al-Muhammadiyah, Book 1, Hadith 4 (In-Book)

Baraa bin Aazib (Radiallahu Anhu) reports: "I never seen someone with long hair and red clothing more handsome than Rasullullah (Sallallahu alaihe wasallam). His hair reached his shoulders. The portion between his two shoulders was wide. He was neither very tall nor very short".:

حَدَّثَنَا مَحْمُودُ بْنُ غَيْلانَ، قَالَ‏:‏ حَدَّثَنَا وَكِيعٌ، قَالَ‏:‏ حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي إِسْحَاقَ، عَنِ الْبَرَاءِ بْنِ عَازِبٍ، قَالَ‏:‏ مَا رَأَيْتُ مِنْ ذِي لِمَّةٍ فِي حُلَّةٍ حَمْرَاءَ أَحْسَنَ مِنْ رَسُولِ اللهِ صلى الله عليه وسلم، لَهُ شَعَرٌ يَضْرِبُ مَنْكِبَيْهِ، بَعِيدُ مَا بَيْنَ الْمَنْكِبَيْنِ، لَمْ يَكُنْ بِالْقَصِيرِ، وَلا بِالطَّوِيلِ‏.‏

also referenced under: Book 1, Hadith 4 (English)