ok. I always need someone to let me know how it fit them.  Luckily someone close to my size got a medium and so did I.  I am 5'8" , 125 pounds and a 36C.  The MED is a bit big around my waist, but I have long arms, and the medium actually has sleeves long enough!  I will try it on with my dress to see if I should return for a small.  However, it is dressy and can be worn with jeans, or to a wedding.  It is a great quality for a $25 coat.  I simply needed a black coat I can wear for special occasions, and this will do it.  Update- warm and nice enough for a wedding.  I am happy I purchased!