Sweet Mommy Maternity Slim Boyfriend Jeans 98%Cotton, 2%Polyurethane Please refer to our size chart (image No.6 or 7) and recommendations below, not to the Amazon size chart. Recommended size: sizes S and M fit hips 35inches, size L fits hips 36inches, size LL fits hips 38inches Measurements in INChes: S [Hips 32-38, Belly 30-40]; M [Hips 32-38, Belly 30-40]; L [Hips 33-40, Belly 32-42]; LL [Hips 35-41, Belly 34-44] Measurements in CM: S [Hips 82-98, Belly 78-104]; M [Hips 82-98, Belly 78-104]; L [Hips 86-102, Belly 82-108]; LL [Hips 90-106, Belly 86-112] Belly panel is adjustable to fit through pregnancy and even after giving birth. A Note About Sizes:For a better fit, when you ordering SweetMommy's wear, we recommend that you select one size larger than usual.