This is a vintage black lace blouse that most likely dates to the 1950s. It is made of machine made Chantilly lace, aka Raschel lace. It has cap sleeves, a jewel (rounded) neckline and a notch opening at the top back that closes with a single black faceted glass button and loop. There is a tuck line near the bottom. It has no labels.
Sizing: As this vintage black lace blouse should fit loosely, I think that it is meant for a medium size. The measurements appear large, but, as mentioned, this should fit loosely and would be tucked into the waistband of a skirt - note the following measurements:
Shoulders: 17” across, including its cap sleeves
Bust: 40"
Waist: 39"
Length: 18" to the tuck line, 24” overall
Condition: This vintage black lace blouse is in very good condition - there are a couple of breaks to the netting at the top right front (see last close-up photo), very minor. Otherwise, no other wear, tear, staining, soiling or odour.
This is a lovely vintage black lace blouse, very much of the period - gorgeous!