My husband is an avid motorcyclist and wanted a microfleece jacket to wear under his motorcycle jacket for extra warmth. He wanted something fairly tight, so I ordered this jacket in both small and medium. He normally wears a Med or Large shirt. The Medium jacket fit well in the torso, somewhat tight, just what he wanted. So I would say these run a little on the small side. The arms are pretty baggy and I will be taking them up.

DH is extremely happy with how warm, soft, and comfy this jacket is. As I said, I ordered two of these. DH's friend tried on the other one and fell in love with it, so now I don't have to return it. :)

Overall, this is a great jacket, very comfy, and manly enough for the biker types. ;) With the arms taken in, it fits really well under a motorcycle jacket. I paid 10 bucks each for these, and it was an excellent deal. These are easily worth twice that.