Vintage 80s The Liberated Lady Strapless Dress in Blue/Yellow Plaid, Size

Punk, 80s-style blue/yellow/black plaid strapless dress with pointed sweetheart-style neckline. Stiffer material at the skirt creates a fuller silhouette. Boned, corset-style bodice. Feels like a synthetic material of some kind. Condition: very good pre-owned condition, missing size/material tag and minor wear but no other specific flaws or imperfections. Based on the measurements below, I would estimate this to be a modern US size XS. Please see specifics for best fit: 16” underarm to underarm 11.75” flat waist 22.5” flat hips 35.5” length