I'm 5'6"; my normal size is 14-16, so for this item I selected 2X(14/16). It fits pretty good, but is longer than i expected. If i were buying off the rack, i'd try the next size down. However, because this buttons all the way up the front, if i got a smaller size, i'd be concerned that the buttons would pull. Although it fits similar to how it's pictured on the model, I wish the item was shorter (like on the model). The model used must be tall. If it was a cotton blend I'd try to shrink it by putting it in the dryer. I'm keeping it, but I don't love it. Short girls beware!