This is a short wrap wool cardigan sweater from the 2017 Walrus Collection by Rick Owens. The sweater has an open front, trapeze hem, and long ribbed sleeves. This can be worn in a number of ways and is easy to throw on over dresses, with pants, or skirts.
There are 3 pin prick sized holes in one sleeve that could easily be repaired (see last photo), otherwise, the sweater is in excellent condition. Labeled a size L, this is a one size piece.