I asked Anas b. Malik: How was the hair of Messenger of Allah ﷺ? Thereupon he said: His hair was neither very curly nor very straight, and they hung over his shoulders and earlobes. (Using translation from Muslim 2338a)
قُلْتُ لِأَنَسِ بْنِ مَالِكٍ كَيْفَ كَانَ شَعَرُ رَسُولِ اللهِ ﷺ؟ قَالَ كَانَ شَعَرًا رَجِلًا لَيْسَ بِالسَّبْطِ وَلَا بِالْجَعْدِ بَيْنَ أُذُنَيْهِ وَعَاتِقَيْهِ