AA, A, or A+ Cup Girl: Finding the Perfect Fit
December 30, 2024If you wear an AA, A, or A+ cup, you’re part of an exclusive club of petite-chested girls who understand that bra shopping isn’t always easy. Finding comfortable, stylish bras that fit perfectly can be a challenge, especially when many brands don’t cater to small cup sizes.
Being an AA, A, or A+ Cup Girl: Finding the Perfect Fit
At BRABAR, we know what it’s like to be rare and misunderstood, which is why we offer wire-free bras specifically designed for AA, A, and A+ cup girls. In this guide, we’ll cover:
✔ What it means to be an AA, A, or A+ cup girl
✔ How to measure your bra size correctly
✔ Sister sizing and when cup sizes change
✔ The best bras for small busts
Let’s dive in and find your perfect fit!
AA, A & A+ Cup Girls: What’s the Difference?
Many people assume all A cup sizes are the same, but AA, A, and A+ cups each have unique fits. Here’s a quick breakdown:
✔ AA Cup – The smallest standard cup size, with a bust measurement just 0.5 inches larger than the band size.
✔ A Cup – A step up from AA, with 1 inch between bust and band size.
✔ A+ Cup – Not quite a B, but fuller than a traditional A cup, with 1.5 inches between bust and band size.
💡 Have you ever felt like A cups were too roomy but AA cups felt too snug? If so, you may be an A+ cup!
Want to be sure about your size? Use our Bra Size Calculator to find your perfect fit!
How to Measure Your Cup Size
Measuring your bra size correctly is the first step to finding the right fit. To determine if you’re an AA, A, or A+ cup girl, follow these steps:
Step 1: Measure Your Band Size
- Wrap a measuring tape snugly around your ribcage, just below your bust.
- Make sure it’s straight and level all the way around.
- Round to the nearest even number—this is your band size.
Step 2: Measure Your Bust Size
- Wrap the measuring tape around the fullest part of your bust (over the nipples).
- Keep the tape snug but not tight.
- Record the measurement—this is your bust size.
Step 3: Find Your Cup Size
| Bust Size - Band Size | Cup Size |
|---|---|
| 0.5 inches | AA Cup |
| 1 inch | A Cup |
| 1.5 inches | A+ Cup |
| 2 inches | B Cup |
👉 Example:
- Band Size: 32 inches
- Bust Size: 33 inches
- Cup Size: 33 - 32 = 1 inch → 32A
💡 If you’re in between sizes, check out our Bra Size Calculator to confirm your best fit!
The Curious Case of Sister Sizing: Do AA Cup Girls Stay AA Forever?
Before we dive into what it means to be an AA, A, or A+ cup girl, let’s talk about sister sizing—and what happens when your cup size changes!
There are two reasons why an AA cup girl might move into the A or A+ cup range:
1. Natural Growth & Body Changes
Our bodies change throughout life—due to age, weight fluctuations, pregnancy, or hormones. If you grow into an A or A+ cup, congratulations! Your bra size will change too.
2. Sister Sizing for the Best Fit
Sometimes, adjusting your band size means your cup size also shifts. For example:
✔ A 34AA girl looking for a snugger fit in a sports bra might size down to 32A.
✔ A 30A girl looking for more room in the cup might go up to 32AA.
💡 Want to learn more? Read our deep dive into sister sizing here.
What Do AA, A & A+ Cup Breasts Look Like?
There’s no one way to define small cup sizes. Every boob shape is unique, and even AA cup girls look different depending on their body type, chest width, and breast shape.
✔ On petite frames, AA cups may look fuller.
✔ On broader ribcages, AA cups may appear smaller.
✔ Some A cup girls have more fullness on top, while others have more volume on the sides.
💡 No matter your shape, confidence comes from wearing the right bra for YOU.
Best Bras for AA, A & A+ Cup Girls
Not all bras are designed with petite busts in mind—but at BRABAR, we create wire-free bras that actually fit small cup sizes.
Here are the best bras for AA, A, and A+ cup girls:
✔ Soft Cami Bra Top – The perfect bra-top hybrid for layering or lounging.
✔ Everyday Wireless Bra – Smooth, seamless, and designed for petite frames.
✔ Lace Halter Bralette – A dramatic, stylish bralette that enhances your natural shape.
✔ Longline Cami Bra – Adds extra coverage and sass for special occasions.
✔ Stretch Bralette – Shapes and contours like a corset bra, but without the wires!
💡 Browse our full collection of petite-friendly bras here!
The Takeaway: AA, A & A+ Cups Are Special!
Whether you wear an AA cup, A cup, or A+ cup, you deserve bras that fit comfortably, look great, and give you confidence.
✔ Measure your cup size correctly using our Bra Size Calculator.
✔ Understand sister sizing to explore more bra options.
✔ Find the perfect bras for petite busts with our curated BRABAR collection.
🎯 Ready to shop? Browse our petite bras here and find the best fit for YOU!