Do your 12 year old girls have. Mine is now a 7 in trainers. It has come out of nowhere as she was always much smaller footed than her friends. She went into lockdown with size 5 feet.
I have size 7 feet and that was always on the larger side when I was at school. I'm sure I didn't reach my adult size until 14.
Her periods haven't started yet and she is only about 5ft 2 so I think she has more growing to do yet. I'm 5ft 8 and her dad is well over 6ft.
Do girls just have bigger feet these days?