My girls are nothing a like.
DD1 is really tall for her age with wide feet, so we often need to go to a shoe shop & get her fitted properly.
DD2 is average height & has tiny feet & with have no trouble buying shoes anywhere for her.

As for me, i can buy my shoes anywhere as well but my Mum always needed to go to a shoe shop to buy shoes.
She had really flat feet which didn't help when buying shoes.