Ingwa Melero Rita White Polka Dot Top

I have a beautiful white top by Ingwa Melero, called "Rita". It has a little bit of ivory discoloration under the arms. It measures 17" long, 16" across the top and 13.5" across the underbust. It does not have a size tag sewn in, but it was sold to me as a small. It has a side zipper to make it easy to slip on and off. I do think that this top was a bit small for a Small----it was tight across the underbust so keep that in mind...it might best fit an XS.