Vintage 80s 2-piece Black Lightning on dark blue knit sweater and skirt set

This is such a darn cute set with black lightning on a dark blue background. Alas, it is too small for me! It is tagged a vintage size 4 but it does stretch. Material is 100% Acrylic. Machine washable. I had washed this but have had it sitting around in a bin for a long time. There is no brand tag only materials, size, and washing instructions tags. Set is in nice condition. I am not seeing any issues. MEASUREMENTS while items are laying flat: SWEATER -Length from top of shoulder to hem 23-3/4" -Across chest underarm to underarm 19" stretches to about 26" -Across hem 16" to stretches to 21" -Sleeve length from seam at top of shoulder to end of cuff 20" -Across the wrist opening (this doesn't stretch much here) 3" stretches to 5" SKIRT -Across waist of skirt 13-1/4 stretches to about 23" -Length of skirt 24-3/4" -Across waist of skirt 20" stretches to about 27"