Size filter needed

Its a beautiful app, but I get tiered of too many times, I try to by a product but it doesnt have my size. Because I only can wear some specific sizes from Zara, that means a size filter is very important to me. If you here my voice, please add a filter, It will pervade a better purchasing experience. -- From a skinny person.

Xiao An about ZARA, v2.2.1