I ordered one from Nordstrom and I really like it, but I'm wondering if I should size up... There is no button or fastening to close it, but if there were I would not be able to fasten it. Does a vest or jacket have to look like it would close, even if it's not meant to?

Sorry no pics at the moment, but here's the one I got, in S petite.

http://shop.nordstrom.com/s/ha.....efined_1_B