Qatadah narrates: I asked Sayyiduna Anas bin Malik (may Allah be pleased with him), "How was the hair of the Prophet (peace and blessings be upon him)?" He replied, "The hair of the Prophet (peace and blessings be upon him) was slightly curly, neither very curly nor completely straight, and it would reach between his ears and shoulders."
Hadith Referenceصحیح ابن حبان / كتاب التاريخ / 6291
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «مختصر الشمائل» (2).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم