Size small and Medium

I'm ashamed to say this but I went from a x-small to a size medium and was embarrassed to tell my mother, who always sent me clothes. So I have about 300 pieces of clothes that are either new with tags or tried once and never worn. All good quality department store (my mom loved to shop). Can't list all brands but some are Guess, H&M, bebe, Calvin Kline, etc.