Bought the 14/16 for my petite 12 year old (4'11" and 95 pounds) and it fit too perfectly. As in, I measured it against her 10/12 Burton coat from last year and it was exactly the same size. She'll outgrow it before the seasons through.
So back it goes. Bummed there's no 18 and bummed the size chart sucked.
Also there are no thumbholes which I assumed the inner sleeve would have but nope.
Otherwise gorgeous and nice quality. (4 starts because the sizing was so off.)