I LOVE this dress. It's perfect for the summer as it's super light weight. I am usually an XS or a size 0 in most brands. I got the xs and it was HUGE. I exchanged it for an XXS which fit ok but was still a tad bit big. I probably could have even gone with an XXXS in this one. I ordered a number of other dresses from Hill House and found I was an XXS in those as well but this style does seem to be just a tad bit bigger than their other dresses. If your between sizes, definitely size down as it runs larger than normal.