I have size 11 feet!!HELP!?

Hi im goin into 8th grade and i want shoes that wont make my feet look bigger then they already are.. im 5'9 and size 11.. i tried on pumas and it made my feet look really long and weird . If you could find any sites that cater to girls with bigger feet that would b cool too! Thanks guys :) (make sure they look kinda nice cuz i am young) Oh yah they have to be sneakers all black or all white!