Yaso brand vest jacket style # YJ101331B outershell : face... 10% polyurethane, 90% pvc
lining... polyester, trim... polyester. I found an x large in women's but want it for a man that wears men's small. Wondering if I need a w's large or x large, or if sizes do not convert like thatfrom men to women lines.

I have sewed since I was 12 and made a lot of my clothes from patterns or scratch. I think a woman's large would do the trick but you need to get the exact measurements of the person you want to fit this garment to before plunging ahead on your project. And also if the man has another vest that actually fits him get the measurements off that vest just to make sure it will fit properly.