Vintage plaid tweed blazer by Intriguing Threads, mostly black & white, medium

Vintage 1980s or 90s plaid tweed blazer by Intriguing Threads, primarily black and white with thin stripes of rainbow colors throughout (see closeups). It has a four-button front and faux pockets. It’s a cotton blend with black acetate lining. Dry clean only. Made in the USA. Excellent condition with original tag still attached to sleeve. It’s labeled size medium and fits about like a modern size 8. Approximate measurements lying flat: Armpit to armpit: 18.5” Waist: 15” Length (from top of shoulder): 24”