Bra Size Calculator

We know where to start - Our bra size calculator will start your journey to finding the perfect fit

What if we told you there is a perfect bra out there for you. A bra that doesn’t slide off your shoulders, won't dig in where it shouldn’t, or create ‘back fat’ you don't have. A bra that feels like you're not even wearing one at all.

Such a bra really does exist and our specially trained Bras N Things fit experts can help you find your perfect fit.

We all know the difference the right bra can make to the overall look of your outfit. Like every piece of clothing in your wardrobe, each Bras N Things bra is designed and created with a specific function and purpose in mind. A t-shirt bra, a strapless bra and a fashion bra all offer a different type of fit, support and feel.

How to discover your correct Australian Bra Size for the perfect bra fit. Follow the below instructions to find out your underbust and overbust size. Once you've got them, line them up on the dial to reveal your recommended bra size. Then start shopping!

1. Underbust Size

Measure around the body, directly below the bust.


2. Overbust Size

Measure across the fullest part of the breast.

  • 8
  • 10
  • 12
  • 14
  • 16
  • 18
  • 20
  • 22
  • 24
  • 26
  • A
  • B
  • C
  • D
  • DD
  • E
  • F
  • G
  • H
30A 30A 65A 80A 0A

Measure Your Underbust

Stand with your arms resting by your side and ideally get someone else to measure around your body, directly below the bust. Make sure the tape is right under your breasts, is straight all the way around and is as tight as possible.

This is how the underband of the bra will fit, so the tape should be tight, but not uncomfortable. It's best to do this measurement while you're not wearing a bra, or you can do it wearing one, just be careful not to sit the tape over your bra or underwire.

This measurement is your UNDERBUST.

Measure Your Overbust

Measure around the fullest part of your bust (usually over the nipple). This is best done while you're wearing a bra. Hold the tape gently so it is resting lightly on your body. Make sure the tape measure is straight across your back, and sits parallel to the floor.

This measurement is your OVERBUST.