This dress style is Casablanca 2049. I had it custom cut to measurements: 33 bust; 25 waist; 36 hips; 55" length (I am 5'2" and wore 3" heels and the length was perfect) with a corset back included in lieu of the zipper, so this dress could fit anyone from a size 0 to size 6--there is plenty of room to let out with this back style. It has been professionally cleaned (can provide receipt as proof if requested) and is in Honolulu for resale.
It is super simple but elegant style: diamond white color, flowy chiffon overlay, simple beautiful beading under bust, sideswept ruching, sweetheart neckline, strapless.