This is a very loose fitting style jacket. if you like your jackets oversized, get your regular size. if you prefer the slightly loose (but not baggy) fit like the product photo, size down. as noted by another reviewer, the sleeves are incredibly long. i would say if you are a typical size 0 or 2 (unless you like the oversized fit), you are likely sized out of this jacket. it's a shame, because the quality is great and the windowpane print is beautiful. i'm sadly sized out.