Vintage 70s Wool Shacket Primary Colors Checkered Plaid Small Shirt Jacket

This is a vintage plaid shirt jacket likely from the 1970's. Bright red yellow and blue plaid, with two front pockets and button front with side slit at hem. Feels like a wool or wool blend. No size or brand tag -- measures approx 18" pit to pit, making it similar to a modern day small or maybe mrdium (compare to a garment you own).