Just received this jacket.  The Medium was perfect.  I usually wear a 10-12 top because of bust size and I initially ordered the Large which fit poorly, the fabric cut on the back panel was oddly cut and the sleeves were too short.  But the Medium was cut perfect, and the sleeves were longer than the Large - which I like.  The Medium still can close, although a tighter fit, it looks better over a summer dress or top without too much fabric gathering.  I like the Wrangler name as well.