Cable knit pullover sweater vest

Thrifted this sweater vest and I love it but I’ve thrifted more items and I need to rotate. It looks to be handmade. There is no size tag although I fit a Medium. Please confirm measurements approximate laying flat in pictures as Poshmark does not accept returns for fit issues. Please see all six pictures provided. Vintage, eclectic grandpa, academia, fall, cable knit, preppy, timeless, neutral, E