100% silk new maxi party prom dress black & gray phyton snake animal print US 12

Maxi long straight dress in black & gray color 100% silk fabric with gorgeous black & gray phyton print, designed by English brand Richards. Perfect dress for a formal summer event. Fully lined inside. Long zipper closure at its back. Personally purchased this dress in London UK but never used it and kept it clean with its plastic tag on it, in smoke free per free home. Please see all pictures for measurements. UK size 16 which fits US size 12. When laid flat, armpit to armpit is close to 21” inches wide & its waist is about 17” inches.