the few reviews i've read about this jacket said to order a size up because it ran small, but i find it to be true to size. i ordered a small (i am 5'3" and weigh 115lbs) and requested a return sticker just in case i'd have to get a medium. but the small fits with room to spare for a bulky sweatshirt underneath. the sleeves are a little long, which i really like and it's very slimming. the octopus blue color is darker than it looks online and i think it's actually much nicer. the inside layer is a well fitting sweater, (i thought it was a fleece) and i have another northface hoodie that is able to zip right into the shell making it kind of fun to mix it up. overall great jacket! =)