Good used condition.  See pictures of tags for fabric content. Size tag says LARGE, but based on measurement (see below) I would say this may fit closer to MEDIUM.  It is open front with no buttons, flared sleeves.  

Approximate measurements lying flat:

Pit-to-pit:  19"

Length:  27"

Sleeve (top of shoulder to end of sleeve):  18" 

Inspect all pictures carefully as they are part of the description.