The letter component of a brassiere sizing designation represents the cup size. This measurement reflects the difference between an individual’s underbust measurement and their overbust measurement. A larger letter indicates a greater difference, thus a larger cup volume. For example, an “A” cup typically signifies a one-inch difference, while a “B” cup indicates a two-inch difference, and so on.
Understanding cup designation is crucial for achieving optimal fit and support. Ill-fitting brassieres can lead to discomfort, poor posture, and even skin irritation. Historically, standardized sizing has evolved considerably, but accurate interpretation of cup sizes remains essential for proper selection. Proper fit contributes to both physical well-being and confidence.