I'm 62" tall and 100lbs, a 32" chest and hip with a 25" waist. The XS fit perfectly and I would have kept this shirt but returned it in favor of the zip up jac, which is more or less the same idea in a different form. I love all my Woolx and tend to lean toward the 100% wool options. I'd planned to pair this with my Nora leggings and may still do so in the future. I recommend this shirt to anyone looking for a sleek and very warm layer!