Baby shoe advice needed?

as kids feet grow so quick most seccond hand shoes are only worn for a short while and are in really good condition. dont listen to what istants say, theyve got to say those things its their job. just use comman sense if a half size bigger looks ok on your daughter buy them. ive got shoes for my daughter on what i think fits her better and the till girl just put s/f on the receipt = self fitted lol laughable really. also some shoes fit different my daughter was measured at 7 1/2 which was ok for the shoes but for some reason the sandals we looked at in that size were small on her. remember mothers know best!!!!