Sz Petite Large (probably fits a modern 6)
NWT!! Early 90s Vintage Laurence Kazar Purple Beaded Halter Gown with Teal Sequins and Beads

Flat measurements:
7.25 neck
17.5 bust
14.75 waist
19.5 hip
19.5 back slit
53.75" long
no stretch

Incredible new with tags deadstock find. The purple and teal combination is both retro and trendy, And because this gown is new it does not have the significant shelf wear that most heavily beaded pieces like this one do.
I did find one small patch of missing liner seed beads near the neckline but it cannot be seen when worn.
No stretch, and the gown appeared to fit my dress form well so if you use her as a fit guide you are good!

This item is sold from a vintage boutique in Cleveland, Ohio.