Vintage 1960s Solid Blue Blazer

Love the 1960s styling on this blue blazer and the oversized buttons! condition: there is some soiling around the neckline, a spot on the right sleeve. measurements, while laid flat, double where applicable. 20 in bust 20 in waist 23 in sleeve length 18.5 in long from shoulder to bottom I have marked is as a size medium, that's just my best guess since there is no size tag. please compare the measurements to a piece you already own that fits you well.