SmartWool NTS Midweight Bottom - Womens 100% Wool Women's sizes: X-Small = size 2, 24-25" waist, 35-36" hip. Small = size 4-6, 26-27" waist 37-38" hip. Medium = size 8-10, 28-30" waist 39-40" hip. Large = size 12-14, 31-32" waist 41-42" hip. X-Large = size 16, 33-34" waist 43-44" hip. 100% merino wool interlock knit, UPF 50+. Machine wash cold, tumble dry low. Comfortable next to the skin, and offering the world's most efficient moisture-management system. Covered elastic waistband for comfort and flatlock seaming to minimize chafing.