1940s Camisoles. "Myrna" brand.
When I got these, they were deadstock, but were extremely dirty so i had to wash them. Most still have some faint staining, you should be able to see in the flat lay photo. You could wear them as is, try to give it a good soak, or dye it your favorite color. :) They are perfect to wear by themselves, or as a soft and comfy undershirt.
XS/S measures about 10.5 pit to pit and has lots of stretch - 23" length
S/M measures about 12" pit to pit and has lots of stretch - 24" length