Ash-Shama'il Al-Muhammadiyah, Book 3, Hadith 26 (English) ⓘ

Qataadah bin Da'aamah As-Sadusi relates: "I asked Anas R.A., 'How was the hair of Rasulullah?'. He replied: 'It was not very twisted, nor very straight. It had a slight twist and was a bit curled, and reached till his ear-lobes'".

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ‏:‏ حَدَّثَنَا وَهْبُ بْنُ جَرِيرِ بْنِ حَازِمٍ، قَالَ‏:‏ حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، قَالَ‏:‏ قُلْتُ لأَنَسٍ‏:‏ كَيْفَ كَانَ شَعَرُ رَسُولِ اللهِ صلى الله عليه وسلم‏؟‏ قَالَ‏:‏ لَمْ يَكُنْ بِالْجَعْدِ، وَلا بِالسَّبْطِ، كَانَ يَبْلُغُ شَعَرُهُ شَحْمَةَ أُذُنَيْهِ‏.‏