Should I Get A Half-Cup Size?

best bra for breast shape with ThirdLove

Our team of Fit Specialists is here to help you find bras that feel like they were made for you. We’ve worked with thousands of women find their perfect fit, so we’re sharing some of our best advice here.


What is the Difference Between Full and Half-Cup Bras?

We love getting questions about half-cups because we think they’re such a game-changer for how bras fit. Calculating your bra cup size can be challenging, and it’s made even more difficult by the fact that up to 50% of women actually fall in between standard cup sizes. This means that before we developed 1/2-cups, the only option for many women was to wear a bra that caused overflow or cup gaping— and that’s not good enough. That’s why we decided to create 1/2 cup bras to better fit our customer’s needs.


How to Determine Your Half-Cup Size

Here are a few ways on how to determine your bra cup size and whether a half-cup size is right for you.

  • If your cups are a little too small, they’ll feel tight and you’ll probably have some overflow at the front or sides. For example, if the cups feel small in a 36B, we recommend sizing up to a 36B1/2. Going up a half-cup size will alleviate any overflow or tightness allowing for a supported feel.
  • If the cups are too big, they’ll feel roomy and you’ll likely have cup gaping. For example, if a 32E (32DDD) is too big, we recommend the size 32D1/2. Going down a half-cup size will eliminate the gaping and ensure a fitted look.

In the past, the only choices in these situations were to live with the bad fit or change a whole cup size, which can be too much of an adjustment.

Beyond potentially being the best fit for you today, half-cups can also be the solution to future fit issues. Since a woman’s breasts can change in size a number of times throughout her life—thanks to things like weight gain or loss, hormonal fluctuations, pregnancy, and nursing—half-cups can ensure you have a great-fitting bra at all times, even with slight changes in breast size.

If any of these fit issues sound familiar, try a half-cup size. If you need some guidance in finding your bra size, take our Fit Finder Quiz™ and if you have additional questions, drop us a line! Our Fit Specialists are here to help with one of our favorite topics.