I have 5'6" 110 lbs. with 34A, bought this sweater in an XS (size 2 in A&F and AE jeans, size 3 in HCO jeans, size 26 in Forever21 jeans) and it fit me perfectly. The arms are fitting and so are the rest of the sweater. It fits me snug but not tight so it's a toasty warm feeling.I live in SoCal so the weather tends to fluctuate from 80 degrees F during the day to 50 degrees at night and this sweater is the best. It is not too heavy so it's ok to wear when the weather gets a little hot around 70-75 degrees.And definitely great for 45-60 degrees weather, it kept me so warm! and it compliments my slim body.Its got a quilted stitching throughout the sweater except the arms as the picture shows, and the hoodie has extra cloth that is folded over as an added hoodie visor. There are magnet in the flaps of the visor to hold the visor down when it's folded. BUT Seriously, this sweater is great for girls who are petite from the torso up. NOT for big-chested chicks. Sorry, it's a cute sweater so I don't think it deserves 3 stars. The price is worth the quality of the fabric, the stitching, and the design.