Hi all
DC is 5, has beautiful long hair, wants it cutting to just past shoulders, currently about 3 inches from bottom of back. Gets in their way at school and when playing (even when tied up)and generally annoys them.
One parent is happy for them to have it cut. Other parent flat out refusing, so...
YANBU - their hair, their choice, regardless of young age.
YABU - too young to make the decision themselves, the hair stays long.