This jacket is pricey but this is the best (warmest) down jacket you can get for a child. Super lightweight and super warm. Nobody else makes kids down jackets with 700 fill down anymore. And the detachable hood is wonderful! My 6.5 year old (35th height, 50th weight) is wearing S (6/7) in black and he'll probably be able to wear it next year. For your reference he's fitting perfectly into the North Face size XS(6) right now. We love it so much we bought the next size up (M in blue) when it went on clearance! We love the black (shiny but in a cool way) and blue is bit different (never seen this blue in jackets!).