Caviar vintage button up long sleeve dress

Caviar long sleeve black dress, the tag has worn away the information however I can make out the imprint of a size 14. Looks and feel like 100% Polyester to me, no stretch, fully lined, no pockets. Fabulous over sized buttons. Measurements Shoulder to shoulder 17” Pit to Pit 20.5” Waist 16” Sleeve length from to of shoulder to cuff is just under 22” Length shoulder to hem is 40” Sleeve opening at shoulder is 10.5” or so. Back slit is about 7”