I usually wear a size M, and the waist fits perfectly. From the website: Design/Styling: These center-press pants are essential for a clean style. The front of the hem is made longer to create a leg-lengthening effect. Furthermore, we've paid attention to making your legs look beautiful by adding center presses and vents on both the inside and outside of the hem. They are versatile items that can be paired with anything, such as T-shirts, long T-shirts, blouses, and knitwear, and can be worn in the office. Fabric: Made from a blend of polyester, rayon, and polyurethane, this fabric has a nice drape, a moderate thickness, and is comfortable to wear.