Lingerie size refers to the specific measurements used to determine the fit of undergarments, including bras, panties, and shapewear. Sizes typically include a combination of numbers and letters, such as 34B or M, which indicate the band size and cup size for bras, and small, medium, or large for other items. Accurate sizing is essential for comfort and support. To find the right lingerie size, individuals can measure their bust, waist, and hip dimensions. Many brands provide sizing charts to help customers convert their measurements into the appropriate size. It's important to note that sizing can vary between different brands, so trying on items is often recommended.