Al-Bara' said God's messenger was of medium height, broad. shouldered, with his hair hanging down to the lobes of his ears. He had seen him wearing a red robe and had never seen anything more beautiful than he. (Bukhari and Muslim.) In a version by Muslim, he said he had never seen anyone with a hanging lock of hair more beautiful when wearing a red robe than God's messenger. His hair reached his shoulders, he was broad-shouldered and neither tall nor short. Muslim.
Source: sunnah.com
Other translations
Arabic
وَعَنِ الْبَرَّاءِ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَرْبُوعًا بَعِيدَ مَا بَيْنَ الْمَنْكِبَيْنِ لَهُ شَعْرٌ بَلَغَ شَحْمَةَ أُذُنَيْهِ رَأَيْتُهُ فِي حُلَّةٍ حَمْرَاءَ لَمْ أَرَ شَيْئًا قَطُّ أَحْسَنَ مِنْهُ. مُتَّفَقٌ عَلَيْهِ وَفِي رِوَايَةٍ لِمُسْلِمٍ قَالَ: مَا رَأَيْتُ مِنْ ذِي لِمَّةٍ أَحْسَنَ فِي حُلَّةٍ حَمْرَاءَ مِنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ شَعْرُهُ يَضْرِبُ مَنْكِبَيْهِ بَعِيدٌ مَا بَيْنَ الْمَنْكِبَيْنِ لَيْسَ بِالطَّوِيلِ وَلَا بِالْقَصِيرِ
sunnah.com