No size tag - fits me well - and I'm between Medium and Large. Or about a 10. Please review measurements. 

No content tag. Appears to be a thick synthetic material that has a linen-tweed look. Very nice. Lining is probably synthetic as well.

Union Tag dating indicates this is probably from the mid-60's.

Flat lay measurements: 

Shoulder to shoulder - 17"

Underarm to Underarm - 20"

Length from shoulder to hem -22"

Well constructed coat with great design elements. Rhinestone buttons are missing some rhinestones. (I counted only three. Does not detract.) Small amount of wear can be found at upper back of collar near neckline - where a hairdo may have rubbed against it.