Pink Night Gown with Black Piping US Size Small

This night gown is very well made with black piping around the collar , down the front of the gown, on the breast pocket, and on the cuffs. The colour is truly beautiful. The manufacturer describes it as champagne but I see it as pink. The fabric feels like satin. The label identifies the size as small. I wear a small but it is too big for me. I think it would fit US size 6 - 8.