Vintage 1930s slip dress in medium weight bias cut rayon satin. This was probably part of a wedding dress set. It has woven cotton straps which are not adjustable. Slips on over the head. In good condition, shows light wear, see last photo.

Due to the nature of bias cut fabric there is a bit of stretch, measurements are taken flat with minimal stretching. 

Bust - 34 inches
Waist - 27 inches
Hips - 42 inches
Length from top of strap to hem - 63 inches