Qataadah bin Da'aamah As-Sadusi relates:
"I asked Anas R.A., 'How was the hair of Messenger of Allah ﷺ?'. 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 ﷺ؟ قَالَ: لَمْ يَكُنْ بِالْجَعْدِ، وَلا بِالسَّبْطِ، كَانَ يَبْلُغُ شَعَرُهُ شَحْمَةَ أُذُنَيْهِ.