They say that 1 in every 8 women is wearing the wrong bra size right now. So many of us have gone our whole lives without having had our bra size measured by a professional - or even by ourselves - so we don’t actually know which styles or cup sizes fit us best. But the right bra can be your best friend: finding a truly supportive, comfortable bra in the right size will bring out the best in you! On the other hand, wearing the wrong bra cup size can lead to discomfort and frustration.
Want to learn more about different bra cup types and how to find your perfect cup size? This breast size comparison tool will teach you the difference between the bra cup sizes and how to measure yourself to find a bra that fits like a dream!
It’ll only take 4 minutes.
How Do I Know My Bra Cup Size?
Your bra size is alphanumeric, meaning it’s made up of a number and a letter. For example, 34B.
- The number refers to your band size, the measurement around your ribcage.
- The letter refers to your cup size, a measurement of the difference between the bust size and the band measurement. For example, an A cup will be a 1 inch difference, a B cup will be a 2 inch difference, a C cup will be a 3 inch difference… and so on.
How to Measure Your Bra Size
Step 1: Underbust
Take a measuring tape and wrap it around your torso right under the bust.
Step 2: Overbust
This time, wrap your measuring tape around your torso at the fullest part of your bust.
To measure yourself at home, you’ll need a soft measuring tape (in inches or centimeters, whichever you’re most comfortable with.)
- Start by measuring just below your bust, wrapping the tape around your body. It should be straight and snug but not too tight.
- Then measure around the fullest part of your bust, again making sure the tape is level.
Once you have both measurements, use our size chart or bra size calculator. Enter your band and bust measurements to find your bra size!
(Change the toogle depending on the metric system in which you have measured yourself: in. or cm)
Find your size
| BRA(inches) | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Step 1: Underbust | Bra SIZE |
|
||||||||||||||
| 25-27" | 30 | 29-31" | 30-32" | 31-33" | 32-35" | 34-36" | ||||||||||
| 27-28.5" | 32 | 31-33" | 32.5-34.5" | 33-35" | 34-37" | 36-38" | ||||||||||
| 29-30.5" | 34 | 33-35" | 34-36.5" | 35.5-38" | 36.5-39" | 38-40" | ||||||||||
| 31-32.5" | 36 | 35-37" | 36-38.5" | 37.5-40" | 38.5-41" | 40-42" | ||||||||||
| 33-34.5" | 38 | 37-39" | 39-40.5" | 39.5-42" | 40.5-43" | 42-44" | ||||||||||
| 35-36.5" | 40 | 39-41" | 40-42.5" | 41.5-44" | 42.5-45" | 44-46" | ||||||||||
| 37-38.5" | 42 | 41-43" | 42-44.5" | 43.5-46" | 44.5-47" | 46-48" | ||||||||||
Another way to find your size
Enter your measurements and find out your bra size.
| BRA(cms) | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Step 1: Underbust | Bra SIZE |
|
||||||||||||||
| 63 - 67 | 30 | 75-80 | 77-83 | 80-85 | 82-89 | 86-92 | ||||||||||
| 68 - 72 | 32 | 79-85 | 82-88 | 85-91 | 88-94 | 91-97 | ||||||||||
| 73 - 77 | 34 | 84-90 | 87-93 | 90-96 | 93-99 | 96-102 | ||||||||||
| 78 - 82 | 36 | 89-95 | 92-98 | 95-101 | 98-104 | 101-107 | ||||||||||
| 83 - 87 | 38 | 94-100 | 97-103 | 100-106 | 103-109 | 106-112 | ||||||||||
| 88 - 92 | 40 | 99-105 | 102-108 | 105-111 | 108-114 | 111-117 | ||||||||||
| 93 - 97 | 42 | 104-110 | 107-113 | 110-116 | 113-119 | 116-122 | ||||||||||
Another way to find your size
Enter your measurements and find out your bra size.
Let’s Talk More About Bra Cup Size
Now that you’ve measured yourself, or at least learned how to, let’s dig deeper into cup sizes.
At Leonisa, we offer cup sizes from B to DD in select styles. However, globally, cup A is considered the smallest. AA cup is typically considered to be the smallest. Some specialty brands even carry up to AAA cups, and many brands carry sizes over DD.
- A and B cups are typically regarded to be smaller sizes.
- C cups are typically considered to fit an average to full bust.
- D and DD cups are the sizes that usually indicate a full bust.
However, these are just generalizations. Allover bust volume is a combination of bust size and band size, so the boobs of someone who wears a 38B may actually look bigger than those of someone who wears a 32D.
💡 Remember: the best way to find the right cup size is by measuring yourself!
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Different Bra Cup Styles
When choosing a bra, you will also want to take the cup style into consideration. Different cup styles offer a different level of coverage.
- Full cup bras provide the most coverage for ultimate support and comfort. They’re recommended for full busts because they support the weight of the bust. Many include underwire for even more support. They tend to have wider straps for support, but most of the support should come from the band of the bra.
Full cup bras are an everyday go-to for C cup size, D cups, DD cups, and beyond. They work great under T-shirts, blouses, or dresses.
- Demi-cup bras AKA half-cup bras cover the lower half of the bust. They have a triangular shape and just enough plunge to make them perfect for low-cut tops. Some of them have convertible straps that can be worn classic or criss-cross in the back, letting you pair them with multiple shirt styles.
- Balconette bras offer a similar level of coverage to demi-cup bras, except the cups are rounded at the top and they can typically be worn strapless. Not only can they be worn with low-cut tops, they can also be worn with sleeveless tops, or anything where you don’t want the straps to be sticking out.
Some cups also come with built-in push-up padding that centers and lifts the bust.
Explore all the bra styles we offer at leonisa.com. We have a bra style for every day, every outfit, and every mood. They highlight your curves, they’re comfortable and supportive, and many of them even disappear under clothes! Just make a wish and find a bra with the features of your dreams.
Still have questions about your bra cup size?
Don’t worry—we’ve got you covered.
The cup size is the letter portion of your overall bra size. For example, in 34B, the B is the cup size. Cup sizes include A cup, B cup, C cup, D cup, DD cup, and beyond!
Using a measuring tape, measure just under your bust for the band size, then measure around the fullest part of your bust. The difference in inches between the two determines your cup size.
The letter reflects the difference in inches between your underbust size and bust size. A cup boobs represent a one inch difference between the underbust and bust sizes, B cups have a 2-inch difference, a C cup size represents a 3-inch difference, and so on.
You’ll know your bra’s cups are too tight if it creates a “quad boob” effect, with extra breast tissue spilling out from the top of the cups. It may look weird, but what’s even more important is that it will feel uncomfortable. Try going up a cup size but staying at the same band size - for example, if you’re spilling out of a 34B, try a 34C for a better fit and more comfortable feel.
A cup that’s too small will dig in and your boobs will spill out from the top. If the cups are too big, you’ll notice wrinkles or gapping. The perfect cup size is one that fits smoothly and supports comfortably. A cup breasts will be subject to gapping a B cup bra, but D cup breasts will spill out of an A cup bra. Finding your cup size will help you find a bra that provides the support - and, most importantly, the comfort - that you’re looking for!
You can try both of the sizes you’re in between and see which one fits better. You may also want to opt for non-molded cups, like fabric cups, for a more flexible fit. Or you can consult with one of our Personal Shoppers!
It’s not unusual for bra cup sizes - or band sizes, for that matter - to change over time. If you’ve experienced pregnancy, weight loss, weight gain, hormonal shifts, or if you just feel like your bra isn’t fitting right, it’s good to re-measure yourself. We also recommend checking your bra size at least once a year just in case.
Yes! We have a full, easy-to-use size guide to help you find your ideal fit. Plus, our Personal Shoppers and our Customer Service team are eager to help you.
Our largest cup size is a DD cup, which is available in multiple styles that offer excellent support.
Our bras start at a B cup, but AA cup is typically recognized as the smallest size. Some specialty brands even offer AAA cups!
