I got two pairs of jeans and two dresses and ordered all of them in a size 6. I am a TRUE size 6 and according to their sizing guide I would still be a true 6 in their clothes. I just got the jeans in today is boy they are TIGHT I can get them to button but def feel like a 2/4. This is same with one of the dresses so I would same unless the clothing is obviously looser I would say to size up 100%