Vintage 70s or‎ 80s Brown Faux Suede/Polyester Jacket - guessing Med, Unisex

Awesome Vintage Suede/possibly polyester Jacket- no fabric listed. has a feel like suede but not thick. Guessing 70s or 80s from label Trying to research Please see measurements bc unsure about sizing. Maybe womens but could be unisex. one water spot on sleeve, see pics but could be dry cleaned lined Great craftsmanship. see back of buttons and stitching Pit to Pit 20" Sleeve length 23" from shoulder length from shoulder to end 33" Guessing a Med bc I'm a lg and too small on me. Glad to provide further info. Such a groovy piece!