What Size Is a 30-Inch Waist?

For example, the size charts provided by J Crew and Levi's both list a 30-inch waist as a size 10, whereas Gap considers a size 10 to be a 29.5-inch waist and a size 12 to be a 30.75-inch waist. These small discrepancies can make the difference when deciding on the right fit. It is important to access the sizing chart online or refer to one in stores.