With the recent sale, my wife ordered a Chugach NX rain jacket to try out.  She ordered a medium as that is what usually fits her in men's stuff.  Surprisingly, it's way too big for her.  In fact, it actually fits me in the shoulders and arms and I could even zip it up (tightly) over a T-shirt and my fat belly.  I usually wear a XL-XXL.  I'm just amazed at the odd sizing.  How do any of you smaller guys fit in this stuff?  Nothing offered in Small?