I have always sized up for toddler coats so they would get a little more wear out of it. What about for big kids? I would think that an older kid would get a little frustrated with a huge jacket. DS1's winter jacket is like a half shirt (it fit him about a month ago when we tried it on). It is a Patagonia size XS (5/6). I will probably get him something from LLB and can't figure out if I should stick with the 6x/7 or go with the 8. He is probably 46 inches and 42 pounds.