HELGA Vintage Dress, Tan White Polka Dot, Short Sleeve, Lined, Thick, Large (?)

HELGA Vintage Dress, Tan White Polka Dot, Short Sleeve, Lined, Thick, Large (?) This dress is a Helga brand dress, possibly from the 60s. It is lined and zips in the back. There is no size tag but I guess the sizing to be a modern Large or XL. Please see measurements to ensure a good fit.