Kindly refer to the following link(s):
Length of hair for men and Braiding men’s hair IslamQ&A
Length of Men's Hair | Sheikh Assim Al Hakeem
Men pony tail | Sheikh Assim Al Hakeem
Is it permissible for Men to Braid their hair? | Sheikh Assim Al Hakeem
Is it obligatory to untie braids before ghusl for Menses & Janaba (Hadith?)
Dreadlocks | Sheikh Assim Al Hakeem