Vintage 80's Slub Silk Black and Hot Pink Asymmetrical Dress

This vintage dress is fabulous! Purchased off etsy but never worn. It has one full sleeve and the other half is like a tube dress. The pink sash goes around the waist and buttons in the back. The size is 40. I am a 6 and it is stiff and hard to bend in. So would be better for a size 4, or someone with less booty. Slubby raw silk. One of the slubs is orange for some reason (see picture!)