Short Answer
Complete Explanation
The number and letter in a bra size refer to two distinct measurements that determine the fit of a brassiere:
- Number (e.g., 34, 36):
The first part of the size is a numerical value representing the measurement around the torso just beneath the breasts, known as the band or ribcage measurement. This is typically measured in inches (US sizing) or centimeters (international sizing). - Letter (e.g., A, B, C):
The second part is a letter that denotes the cup size, which indicates the volume of the breasts relative to the band size. Cup sizes are generally based on an incremental increase in breast circumference compared to the band measurement.
For example, in a bra labeled “36C”:
- “36” represents a 36-inch (or cm) band measurement around the torso.
- “C” indicates that the breasts occupy approximately a certain volume relative to this band size, with each letter representing an increase in cup capacity (A, B, C, D, etc.).
History / Background
The concept of bra sizing dates back to the early 20th century when brassieres began to be mass-produced. Initially, sizes were less standardized and varied by manufacturer. Over time, particularly after World War II, the industry adopted more uniform sizing conventions. The use of letters (A through G or beyond) to denote cup volume became commonplace, while band measurements remained numeric. Different countries may use slightly different systems; for instance, European sizes often omit the letter entirely in favor of a single numerical value that combines both band and cup dimensions.
Importance and Impact
Bra sizing is crucial for achieving comfort, support, and proper fit. An accurately sized bra reduces discomfort, prevents back pain, and enhances posture. Inaccurate sizing can lead to sagging, inadequate support, or skin irritation. The standardization of bra sizes across brands facilitates easier shopping and helps consumers find the right fit more consistently.
Why It Matters
Understanding bra size notation is essential for anyone who wears a brassiere. Knowing how to measure one’s own band and cup dimensions ensures that purchased bras provide optimal support and comfort. This knowledge also aids in navigating online shopping, where trying on physical garments may not be possible.
Common Misconceptions
The letter size directly corresponds to breast cup volume in a linear scale (e.g., A = 1 inch, B = 2 inches).
Cup sizes are relative to the band measurement; each letter represents an incremental increase in volume that varies by brand and style.
All brands use the same sizing chart.
Sizing can differ between manufacturers due to variations in fabric stretch, construction methods, and regional standards.
FAQ
How do I measure my bra band size accurately?
Wrap a soft tape measure around your torso just beneath the breasts, ensuring it is parallel to the ground. Record this measurement in inches or centimeters; this is your band size.
What does each cup letter represent?
Each cup letter (A, B, C, etc.) denotes an incremental increase in breast volume relative to the band size. The exact volume difference varies by manufacturer but generally represents a 1-inch (or cm) increase per step.
Can I convert European bra sizes to US sizes?
Yes, European sizes combine band and cup dimensions into a single number (e.g., 90C). To convert, subtract the cup letter's corresponding band measurement from the first two digits of the European size to find the band size, then identify the cup letter.
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