Reformation vintage dress

Unique vintage dress altered/up-cycled by Reformation, purchased at their Lower East Side NYC location. Black slub fabric with organic cream polka dots. Unknown fabric content as interior tags have been removed during the alterations. My guess would be a cotton/poly blend. Long cuffed sleeves with covered buttons. Slightly empire waist and low-cut (cleavage-bearing) neckline. Metal back zip. Slim skirt. Unlined- alterations obvious from inside the dress but not outside. Hanging loops have been added. Nonsmoking household. No marked size but I would call this a true XS- see photos for measurements.