Jon Rico non leather suede vintage 80s mauve trench coat. S/M

Cool vintage mauve trench coat. I 💗 '80s! No stains or rips. From pet free, smoke free home. Shoulders measure: 16 1/2 " across, chest measures: 20" across, waist measures: 20" across. I'm 5' 7" and would normally wear an 8/10 or M/L in a coat. I feel like this is close to being too small. I would say it would fit a 6/8 size better than me at an 8/10 size.