The fabric has a slub type look - possibly silk, but could be a polyester dupioni faux silk.  It is a lovely fabric with a pretty texture.  The jacket is lined.

I purchased this years ago from a local estate quality vintage clothing collection.  I used it on a mannequin but never wore it.  The only flaw I noticed is a light spot on the back of the jacket close to a seam - very light stain or discoloration mark. (See last two photos.)  It really isn't noticeable to me and I would wear it as it is.

Dress measurements are - approx 18 inches underarm to underarm across the front.  Approx 15 inches across the waist.  Approx 17 inches across the hips.  Length approx 35 1/2 inches.  The jacket is approx 21 inches long measured down the back.