When I was little I was called fat and I never was, I was actually a healthy size. But my daughter just yesterday said "mummy, am I to big?" and she is only 4 (bless her) She is a perfectly normal size for her age. But, I am asking you, Why are teens and children so obsessed with how they look and how big they are?
It sounds to me it's causing more bother than it's worth.
Has your LO ever came up to you and said something like that?
It kinda upset me as she has only started school in September and already she is overhearing older children talking about this and such