Finding your Fit: Nursing Bras

March 16, 2018

I’m sure you have heard it all before.  What’s the big deal with a bra fitting?  You must wear a properly fitted bra if you are to be supported and avoid the chance of sagging.  But how do you know if your bra is fitting properly or if you are wearing the correct size?  See a few pointers below. 


Your underband should be parallel and firm.  You should be able to stretch out the underband at the back by 4 fingers depth.


The wires or the cups should be fully emcompassing the breast.  The wires should be on the chest wall and not at all on the tissue of the breast.   

Top cup:

You should be able to fit your 2 fingers in the top cup and run this up and down with enough stretch.  This allows for growth for when your milk is in and the stretch allows the bra to fit well, just after you’ve fed. 

The straps:

These should be firm and not too tight.  They should be taking the weight of your bust so make sure they are not too loose either.  They will loosen off after a few wears, so make sure that you keep readjusting them occasionally. 


While wearing a non-padded bra, measure around the
band of the bra. The measuring tape should be level and snug.
Round to the next whole number then refer
to the chart below to determine your band size.


Now measure around your breasts where they are at
their fullest. Round off to the next whole number (If you measured
34.6 inches,then round to 35) to get your bust size. 


Deduct ‘BAND’ measurement from your ‘CUP’
measurement and refer to the table below
to work out your ‘Cup Size’.


What are some features to look for in a nursing bra?


What you used to do is completely change your style and then go looking for a dowdy nursing bra.  There are all sorts of nursing bras out there now so you don’t have to compromise on your style or activities and you can get on with your day. 

Look for a bra that is cotton lined, this will help keep you cool when your temperature rises (as it does when you are pregnant and breastfeeding). 

Flexible wires that sit wider on the body – this is hard to know unless you try it on.  There should be no breast tissue anywhere near the wire.  The wire should be completely on your chest wall. 

Look for a double back or linings and durable fabrics as you will be wearing your bras for 24hours a day and they will also be tugged and pulled at more than your usual bra.  Look for strong elastics and wider straps. 

A good maternity bra will have an extended hook and eye piece to accommodate growth and reduction throughout your pregnancy and post. 


Here are some common bra mistakes and how to handle them. 


If you bra is riding up your back, it’s too big.  It should be parallel to the floor. 

Are you double boobing: 

Is your centre front against your chest wall?

Are the wires sitting on you breast tissue?

If yes, then you will need to increase your cup size. 

Is there too much space in the top cup? Is there a gap between the wire and your breast?

If yes, then you will need to go down a cup size. 

Do you feel supported?  If no, then tighten your straps or maybe your bra is at the end of its life. 

Take the time to choose the right fitting bra so that you are supported and comfortable.  Then you can spend more time doing the things you like!

Finding your Fit: Nursing Bras

Katie Brooker

Head Designer at Cake Maternity

Like many women out there, Katie Brooker is an avid multi-tasker. Apart from being the head designer and fit technician for Cake Maternity, she’s the mother of 2 diverse young girls. Her goal is to provide comfort and support to breastfeeding mothers and to help them achieve this with beautiful bras that will fit and endure that rigorous path. See more of her designs at or follow her on @cakematernity

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