It was narrated that Anas said:

“The hair of the Messenger of Allah (ﷺ) was wavy, and (hung down) between his ears and his shoulders.”

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، أَنْبَأَنَا جَرِيرُ بْنُ حَازِمٍ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، قَالَ كَانَ شَعَرُ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ شَعَرًا رَجِلاً بَيْنَ أُذُنَيْهِ وَمَنْكِبَيْهِ.