Vintage Blue and Black Polka Dot Button Up Top

Vintage Blue and Black Polka Dot Button Up Top from Kelley & Co. There is no size tag, but it would best fit a size 3X, see below for the exact measurements. The material is a silky satin and non-stretch. The top has unique black triangle buttons. 

Measurements (taken flat in inches):
Chest and Waist 42"