It's commonplace for strict haircut standards to be enforced at private boys schools, with principals often sending students to get haircuts during school hours.

Hair must be above the collar, off the ears, not over the eyes and not styled or cut in an "extreme manner".

The sacking of much-loved Trinity Grammar deputy principal Rohan Brown - after he was filmed cutting a student's hair with scissors on photo day - has thrust the issue of school hairstyle policy back into the spotlight.

A screenshot from a video of Trinity's deputy principal cutting a student's hair.

A Trinity Grammar newsletter sent to parents prior to week two of the 2018 school year outlined the school's hair policy that the boy breached.