It's vintage goth! Thin knit cardigan with red accent lines and buttons. Material is not labeled but I believe it is polyester or acrylic (not itchy, has stretch). Hard to date without any tags, but I believe it is 1960s or 70s.
Measurements
14.5"
15.5 unstretched and buttoned"
24.5"
Fits a Modern Women's X-Small closed or Small open