How would you approach this?

[NotBanksy]

A parent spoke to me last week to say her daughter was being teased during p.e for the type of vest/bralet top she wears. The pupil says that all the girls are involved with it (they are 7)

Been thinking it over and I can't decide on an approach. How would you handle it?

How would you deal with teasing about anything else?

I don't work in primary so don't have any experience of this particularly but i'd have thought it was a case of following the school behaviour policy?

PSHE on how we are different and like different things?