30DDD

30DDD is a bra size used in some Western sizing systems. The 30 refers to the band measurement around the torso, typically near 30 inches, while the DDD cup size indicates a fairly large cup relative to that band. The DDD label, also called triple-D, denotes a cup volume that is larger than D and DD. Because bra sizing is not standardized across brands and regions, the same numerical label can represent different actual volumes depending on the manufacturer. In some international systems, the same bust may be listed with different band and cup combinations, so equivalents such as UK or EU labels can vary.

Measuring for a 30DDD generally involves two steps: determining the band size by measuring snugly around the underbust and choosing a band that closely matches the 30-inch target, and then measuring the full bust to find the cup difference. The difference in inches between bust and underbust corresponds to the cup size in many US brands (for example, larger differences yield higher cups). Because cup volumes vary by brand and style, a 30DDD in one brand may fit differently from a 30DDD in another.

Fit considerations are important for this size. Individuals with 30DD or 30E sister sizes may need to try multiple cuts (full-coverage, balconette, molded, or minimizer styles) to find the best shape for their breasts. The center gore, strap width, band elasticity, and wire width can all affect comfort and support. Proper support often requires professional fitting, especially for full or projecting breasts, to avoid issues such as gaps, underarm spillage, or band riding up.

Varied sizing means trying several brands and consulting size charts. Some shoppers also explore sister sizes (e.g., 28F or 32DD) to find a more comfortable or better-fitting option.