"Size 30" typically refers to a clothing size, particularly in women's fashion. In many sizing systems, a size 30 corresponds to a waist measurement of approximately 30 inches. This size can vary slightly between different brands and styles, so it's important for shoppers to check specific size charts when purchasing clothing. In the context of jeans, a size 30 often indicates a mid-range fit, appealing to a variety of body types. It is commonly found in both casual and formal wear, making it a versatile choice for many wardrobes. Brands like Levi's and H&M offer size 30 options in their collections.