Sequin batwing half sleeve gold top SZ M/L

Excellent preowned condition. Tag looks like it is vintage. Has a stretchy attached tank. Measurements look like it could fit a medium. Please confirm Measurements approximate laying flat in pictures as Poshmark does not accept returns for fit issues. Please see all seven photos. Pit to pit measurement of underlining tank is 16”. Sequin, holiday, thanksgiving, event, Christmas, party, cocktail, batwing, flowy, elegant