Panty size refers to the measurement used to determine the fit of women's underwear. Sizes typically range from small (S) to extra-large (XL), with some brands offering additional sizes like plus or petite. The sizing can vary between manufacturers, so it's important to check specific size charts for accurate fitting. To find the right panty size, women often measure their waist and hip circumference. This information helps in selecting the appropriate size from the available options. Additionally, styles such as bikini, brief, and thong may fit differently, so personal preference plays a significant role in choosing the right panty style.