Over 35% of all lingerie sold in the US is plus-sized. In panties, briefs are a good style for women who wear larger sizes. Plus-sized briefs usually start at size XL and go up from there. Some brands will range up to a 5X, which is the equivalent of a 50-51"" hips and 37"" waist.
Plus size briefs will have a waistband that sits just below or right at the navel. Unless the leg openings are a high-cut style, the leg openings will sit just at the top of the thigh. Plus-sized briefs have the benefit of providing full rear and side coverage, meaning less visible lines. Many brands specialize in lingerie for larger women, and almost all brands offer several styles of womens briefs in plus sizes.