A 1940s vintage off white sheer fine cotton blouse front insert or dickie dickey with a lace edged small collar.
These were worn under suits jackets.

A bib style with fine inserts of lace running down the front along with a Vee neck and small collar.
It goes over your head and it has a small piece at the neck in the back.
It ties at the waist.

It is basically one size fits most. It will fit up to a 38 bust.

It has minor easily fixed flaws. The collar back at the bottom has a small piece that needs to be sewn.
It is missing one side tie.

I have not laundered it to retain the ivory color. It is not soiled.
I added a photo of a similar pattern to show the details.

This item is sold from a vintage boutique in PA.