Vintage sheath dress colour block black green purple gold button NWT XLg

Fun colourful dress from the 80's still with tag. Made in Canada. Shoulder pads. Zipper to back. Never worn, great condition with a few pilling spots to fabric. Tag says size 15/16 but things must have run smaller in the 80's lol. I'd say this could be LG/XLG. Have a look at the measurements: 22" armpit to armpit 41" length 18.5" across waist 22.5" across hips