How To Configure Bra Sizing Across Different Brands

Many people are familiar with a system of bra sizing that refers to a band measurement in numerals and one or more letters to indicate cup volume. While you may know your size in brands and styles of bras that you have worn before, there is no consistent industry-wide standard for bra sizing. Learn how to configure bra sizing for a better fit from any brand and style of bra.

Understanding What Bra Sizes Mean

The math for measuring bra band and cup sizes is relatively standardized. Sizing gets complicated because specifications vary across different brands and styles of bras. In other words, bras in size 36C by different brands might not provide the same fit for a wearer of this size.

You should also be aware that styles vary between brands. For instance, a full-coverage bra by one brand may have larger or smaller cups than a similar style by another brand. The same size of different bra styles by the same brand, such as a t-shirt bra and plunge bra, can also fit differently.

Measure Your Size Accurately

Measurements are useful for configuring bra sizing. Determine your band size by using a soft measuring tape to measure around your torso under your breasts. You should then add 2 inches to an even number of inches or 3 inches to an odd number to account for the design of a bra band

The best way to calculate your cup size is to measure around the fullest part of your chest. Subtract your band size from your bust to determine the over-bust differential that corresponds to cup sizes. A differential of 1 indicates an A cup, 2 indicates a B cup, 3 indicates a C cup and so forth.

Reference Brand Size Charts

Once you know your measurements and exact bra size, you should be better able to account for variations across brands. Brand size charts are a good starting point. Some brands also offer helpful tools, such as a bra fit quiz. You should use all of the available resources to find bras that provide the best fit. 

It is also useful to know about sister sizes, which are bras that have different band sizes and the same cup volume. If the band of a bra in your size is too tight in a particular brand, try the next band size up and cup size down. For a band that is too loose, try the next band size down and cup size up.

Choose a Brand With Half-Cup Sizes

If you have an over-bust differential that puts you between cup sizes, you should consider a brand that makes bras for women in half-cup sizes rather than sizing up or down. The availability of these sizes can help you get the best fit.

These tips for configuring your bra size can be useful when you want to try a different brand or style of bra. You are more likely to find supportive and comfortable bras when you choose a brand that offers a variety of styles in a wide range of sizes.