Most advice on finding your sports bra size starts with a measuring tape, but for millions of women, that’s where the trouble begins. Studies show that around 80% of women are wearing the wrong bra size, a number that reveals a deep flaw in traditional sizing methods.
For active women with larger busts, a bad fit is more than a comfort issue. It’s a barrier to movement that can cause neck tension, poor support, and a silhouette that’s anything but flattering. That’s the exact frustration that inspired Kentucky-based brand Betty & Joan, which offers a better way to find a perfect fit without the guesswork.
Why Standard Sizing Fails Women With Larger Busts
Conventional sports bra sizing, based on simple band and cup measurements, just doesn’t account for the support needed during high-impact activities, especially for larger chests. Many traditional sports bras simply compress breast tissue against the chest wall. While this might reduce bounce, it often creates an unflattering shape and feels restrictive.
On top of that, typical strap designs put all the weight on the shoulders, leading to chronic neck and shoulder strain for well-endowed women. This gap in the market shows a clear need for a smarter approach to sports bras, one that moves beyond generic sizing to a system that truly understands different body shapes.
How Do I Find My Size With the Betty & Joan System?
Betty & Joan gets to the heart of the fit problem by ditching the measuring tape entirely. The brand, named for the founders’ grandmothers Betty Cook and Joan Crawford, grew out of the personal frustrations of a family of well-endowed women who could never find bras that worked. Their solution is a proprietary system called “Revolutionized Sizing.”
Instead of relying on complex math, the system is intuitive, using both bust and band size to create a more accurate, supportive fit right from the start. This design solves the common problem where a band that fits is too small in the cup, or a cup that fits has a band that’s too loose. It’s a completely different way of thinking about bra sizing, focusing on a woman’s actual proportions instead of abstract numbers.
The Betty comes in sizes 0 through 5, and the process for finding your size is straightforward. You start with your band size, then factor in your bust size to land on the right number.
One practical tip directly from Betty & Joan: if you prefer more compression, size down by one. The wide band is designed to hug your ribs securely, and the extended front and side panels adjust to your bust size rather than forcing your bust to conform to a generic cup shape. It is sizing that works with your body instead of against it.
What Makes The Betty Sports Bra Different
The Betty Sports Bra is built around four core design choices that set it apart from mass-market options:
- Revolutionized Sizing accounts for both bust and band, solving the mismatch problem that makes so many standard bras feel off no matter what size you try.
- Higher front coverage keeps cleavage in check during movement, addressing one of the most common complaints among active women with larger busts.
- Lowered Y-strap back distributes weight more evenly across the back rather than letting thin straps dig into the trapezius, which meaningfully reduces neck and shoulder strain.
- Multi-panel support provides structure for high-impact activity without rigid cups, supporting each side individually to prevent the compressed, flattened look that compression-only bras create.
- High Impact Performance Fabric made from a Poly-Spandex Super Stretch Interlock (79% polyester, 21% spandex) with a soft hand-sanded finish, MaxDri moisture management, and UPF50+ protection, so it performs whether you’re running, doing HIIT, or just wearing it through a long day.
Who It Is For
The Betty Sports Bra was designed for women who have been let down by generic activewear, particularly those with larger busts who need real support for high-impact activity, anyone dealing with neck and shoulder pain from everyday bra straps, and women tired of fit issues like cleavage spillover, side spillage, or a flattened, unflattering shape. It also comes in both white and black, so it works whether you’re layering it under a shirt or wearing it on its own.
Betty & Joan sells 100% direct to consumer and ships from Kentucky, which keeps the experience personal and the quality consistent. Their promise is simple: supportive, stylish, comfortable. For women who have spent years looking for a sports bra that delivers on all three, that’s not a small thing.
If that sounds like you, shop The Betty Sports Bra at bettynjoan.com and see what the right fit actually feels like.