I love Patty Boutik clothes and this is a very cute light weight jacket. I am 5'10", 155-160 pounds and I usually wear size 8-10 with 36DD chest.  I ordered a Large in this. It fits everywhere except a little tight in the arms. I can close the jacket with a T-shirt or tank underneath. However, I would not be able to close the jacket  with a sweater or heavy clothing item on underneath.  The arms would be way way too tight. Still cute little jacket to throw on during the spring..