Brand new with tags.

Sz AU/UK 14, but since it is vintage it will probably fit a size S or M. See measurements below. 

Measurements: 

Armpit to armpit: 13 inches (unstretched) --> 18 inches (stretched)

Waist: 12 inches (unstretched) --> 16  inches (stretched)

All measurements taken with the garment lying flat.

Elastic is still great.

The portions with a pattern are sheer. Slight bullet bra.