Are there? I have never been one to judge what other mums wear. I bought a new pair of wedges recently (about a 5cm "heel") and I thought they were so cute I really wanted to wear them even though I was just doing basic "mum" stuff for the day. So I wore them with jeans and a jacket and at school pick-up I was sized up by a group of mums and one of them whispered (but clearly meant for me to hear) that I was overdressed and "trying too hard".
What the? I wasn't wearing stilettos, just a pair of canvas wedges! Have I broken some unwritten rules?