Finding a bra that fits just right shouldn’t feel like a guessing game. But with so many sizes, styles, and fit variations, shopping for bras can get confusing fast. That’s where a bra size chart comes in. Whether you’re shopping for your everyday t-shirt bra, the best minimizer bras, or the best plus size bras, knowing how to use a size chart can help you find a perfect fit—without the dressing room drama.
Let’s break down what those measurements really mean and walk through how to use a bra size chart the right way.
Understanding Bra Size Measurements
To use a bra size chart effectively, it helps to first understand the two key measurements that determine your bra size:
- Band Size (the number): This is the measurement around your ribcage, just under your bust. It forms the numerical part of your bra size, like 34 or 38.
- Bust Size: This is the measurement around the fullest part of your chest.
- Cup Size (the letter): Your cup size is determined by the difference between your band and bust measurements. For example, if your bust is 1 inch larger than your band, you’re likely an A cup; 2 inches = B cup, and so on.
Together, these numbers and letters form your full bra size—for example, 36C or 40D.
Step-by-Step Guide to Using a Bra Size Chart
Ready to find your best-fitting bra? Follow these simple steps to get accurate measurements and use the bra size chart effectively:
Step 1: Measure Your Band Size
Use a soft measuring tape and wrap it snugly around your ribcage, directly under your bust. Make sure it’s level all the way around and not too loose, round to the nearest whole number.
Step 2: Measure Your Bust
Wrap the measuring tape around the fullest part of your chest, keeping it straight across your back. Again, round to the nearest whole number.
Step 3: Calculate Your Cup Size
Subtract your band size from your bust measurement. The difference determines your cup size: 1″ = A, 2″ = B, 3″ = C, etc.
Step 4: Use the Bra Size Chart
Now, plug those numbers into a bra size chart to find your recommended size. It’s that easy!
Once you know your size, you can confidently shop styles that work best for your body and wardrobe. For instance, the best minimizer bras are great for smoothing and reducing bust projection, while the best plus size bras offer support and style for fuller figures.
Final Thoughts
Finding your true bra size is the first step toward all-day comfort and confidence. Using a bra size chart ensures you’re not just guessing—and with ThirdLove’s wide range of styles and inclusive sizing, there’s truly a perfect fit for everyone.