How Do I Find My Bra Size? (Because Guessing Isn’t Working)

Let’s just say it… If your bra comes off the second you walk through the door — something’s not right.

If you’re adjusting your straps all day, pulling the band down, or dealing with cups that almost fit… you’re not alone. 8 out of 10 women are wearing the wrong bra size and just making it work. Not because they want to — but because no one actually shows you how to find the right bra size. So let’s fix that.

Gorteks Astrid Black Semi-Padded Lace Bra

How To Measure Your Bra Size (Without Overthinking It)

You don’t need a fitting room or a whole production. Just a measuring tape and a few quiet minutes. But before you start, it's important to remember that if your measurements are between two sizes, it's always recommended to round UP for a more comfortable fit.

Step 1: Measure Your Band Size

Start with your underbust — right underneath your breasts.

Wrap the tape around your body:

• Keep it straight and level (this matters more than you think)

• Pull it snug, but not uncomfortable

• Exhale before you measure (yes, it makes a difference)

  
  

👉 This number is your band size

Step 2: Measure Your Bust

Now measure around the fullest part of your bust.

Stand naturally (no sucking in, no adjusting everything into place).

• Wear a comfortable, non-padded bra

• Keep the tape parallel to the ground

• Don’t pull tight — you’re measuring, not compressing

👉 This gives you your bust measurement

Step 3: Work Out Your Cup Size

This is where people start to panic — don’t.

Take your bust measurement and subtract your band measurement.

👉 The difference between the two = your cup size

That’s it. No complicated formulas, no guessing.

It’s really important to remember that not all brands size the same way. Every label uses its own measurements and fit standards, which means your size can shift from brand to brand. That’s why we’ve added a bra size guide under each individual product on our website — to help you get it right every time.

Our little pro tip? Take your measurements, save them on your phone, and use those as your guide when shopping. Don’t stress too much about the size label — focus on your actual measurements. Because once you shop for your body (not the number on the tag), you’ll never second-guess your size again.

Gorteks Pamela White Full Cup Lace Bra

“But I Measured… Why Does My Bra Still Feel Wrong?”

This is the part no one really talks about.

Bra sizing isn’t universal.

Every brand fits differently. The way something is cut, stitched, and designed changes how it sits on your body.

So yes — you can be one size in one brand and something slightly different in another.

👉 It doesn’t mean your body is the problem. It means the size of the bra is. So always check the size guides unique to each brand to ensure you choose the right size in that range.

Wacoal Back Appeal® Rose Dust Minimizer Bra

Sister Sizes (The Thing That Changes Everything)

If you’ve ever tried on a bra where: the cups feel right… but the band doesn’t or the band fits… but something still feels off? This is where sister sizing comes in.

Sister sizes have the same cup volume, just a different band fit.

For example: a 38C could also wear a 36D (same cup volume but more snug around the back) or a 40B (same cup volume but with a bit more room around the back).

All 3 bras technically hold the same tissue volume — they just sit differently around your body.

The Sister Size Rule (easy to remember):

• Go up in band → go down in cup

• Go down in band → go up in cup

It’s a small adjustment that makes a big difference.

MAT Classic Milk Triangle Lace Wire-Free Bralette

How a Bra Should Actually Feel (Not Just Look)

This is where everything clicks.

Because a bra can look good… and still feel completely wrong.

The Band

This is where your support comes from.

• It should stay in place when you move

• If it rides up → it’s too big

• If it digs in → it’s too small

  
  

You should feel supported, not squeezed.

A good rule of thumb is the two-finger test — you should be able to comfortably slide two fingers between your band and your back. If you can fit more than that, the band is likely too loose. If you can’t fit them in at all, it’s probably too tight. The goal is that sweet spot where it feels secure, but never restrictive.

The Cups

This is usually where the frustration happens.

• Spilling over → it's too small

• No gaping or wrinkling → it's too big

Your underwire should always sit behind your breast tissue, never on top. The center gore (that piece between the cups) should sit flat against your chest. If it’s floating? The fit is off. These small details can changes everything.

The Straps

Straps are there to assist — not carry everything.

• They should feel secure, not tight

• No slipping

• No deep marks on your shoulders

If your straps leave you with shoulder pain or deep red marks at the end of the day, it is most likely that your bra is relying too much on your straps for support instead of your band. Your band should be doing about 80% of the work, and your straps the remaining 20%.

The Part No One Says Out Loud

Your bra should not feel like a torture device. It’s not something you should be pulling or adjusting the whole day. A well-fitting bra should be something you forget you’re wearing most of the time.

Final Thought

Finding your bra size isn’t about chasing a number on a label.

It’s about understanding:

• how things should feel

• what actually fits your body

• and giving yourself permission to stop settling for ill fitting and uncomfortable bras

Because once you find the right fit…

You don’t think about your bra anymore. You just feel good in it.

Find Your Perfect Fit