I got the small even though i usually order a medium for sweaters because i prefer them bigger and i'm glad i got the small. the sleeves are very long (which i love) and the sweater is also loose fitting (also, love). the color is gorgeous and it is thick but super soft. i wouldn't wear anything underneath it unless tucked in because the front just comes to the top of my pants. overall, it's gorgeous and i would definitely recommend this!!