Vintage size 4, runs very small, modern size is likely closer to 00-0. Fabric has absolutely no stretch. Has a fully functional hidden zipper on the side, in addition to functional front buttons, but I wasn't able to fully zip the dress as it is too small for my mannequin. Beautiful deep red color with a black sheen. Fully lined. Last photo shows color in direct sunlight.

Please refer to approximate measurements:

Armpit-to-armpit: 15.75"

Waist: 12"

Total length: 58"