Besides the size you should buy a shoes in those criterieas : 1.Easily Cleanable & Durable 2.interms of color go for Neutral color tone and shoes that has at most 1 color.(Black,Gray,Beige/kaki,Brown)..the reason for this color choice is most of this neutral color shoes go well with your outfit such as your shirt,jeans ..whatever you wear Most of this colors Won't clash with your cloth outfits.