Understanding US vs. UK Bra Sizing
Navigating the complex world of bra sizes across different countries can be a bewildering experience, often leading to ill-fitting purchases. The disparity between UK and US sizing methods is a prime example of this, particularly when it comes to band and cup sizes. Here's a more detailed look at the nuances and why they matter:
Understanding Band Size Discrepancies: In the UK, the band size is generally equivalent to your diaphragm measurement. Some professional fitters even recommend rounding down to the nearest even number if you measure at an odd number, like 35 inches, suggesting you try a band size of 34. In contrast, the US method typically adds 2-3 inches to your diaphragm measurement. So, a 35-inch measurement would equate to a 38-inch band size in US sizing. Recognizing this divergence is crucial because the gap of up to 4 inches can substantially affect your ultimate cup size.
The Importance of Band Size in Cup Calculation: Before zeroing in on your cup size, ensure you apply the correct band size methodology per the country-specific sizing guide. To illustrate, let's consider a diaphragm measurement of 35 inches and a bust measurement at its fullest point of 43 inches. Your cup size is calculated in the UK by subtracting 43 - 34, equating to 9 inches and a corresponding G cup (the UK sizes go A, B, C, D, DD, E, F, FF, G). Conversely, using the US formula, your cup size would be 43 - 38, or 5 inches, translating to a DD/E cup (US sizes go A, B, C, D, DD/E).
A Universal Suggestion for Sizing: We recommend using your raw, unaltered diaphragm measurement as a starting point, irrespective of whether you're working with UK, US, or EU sizing systems. Relying on conversion charts for cup sizes without factoring in the band size differences can lead to disappointing results. A useful tip is to decrease your cup size by two sizes when you increase your band size by one, as a way to begin your search for the best-fitting bra.
Armed with this information will give you a better chance at finding a bra that offers comfort and support, no matter where you're shopping.