Wonder why size matters?

We are born unique. Choosing the right size is critical for comfort, effective milk expression and to prevent damage. So for once, size really matters.

Do you have the Philips Avent Hands-free Electric Breast Pump?

Our guide can help you either way.

Where are you in your journey?

Tell us if you’re pregnant or have given birth for useful sizing tips throughout this guide.

Where are you in your journey?

Tell us if you’re pregnant or have given birth for useful sizing tips throughout this guide.

Choose your measuring method

Measuring when pregnant: Your nipples change during pregnancy. Measure them now, and again when you’re a few weeks into breastfeeding.

Choose your measuring method

Measuring when breastfeeding: The best time to measure your nipples is before you breastfeed or pump, or at least an hour after you’ve finished.

Choose your measuring method

When to measure: Your nipples change during pregnancy, after birth, and while breastfeeding. Re-measure them occasionally to check you're still using the right size.

Step 1 out of 4

Find a ruler and a card

You’ll use your card to align the ruler against. You get the best angle and most accurate measurement this way.

Step 2 out of 4

Stimulate the nipple

Important! Don't skip this step. Find a comfortable, private area. Place your thumb and forefinger on your areola (the darker area around your nipple) and squeeze gently until it perks up.

Step 3 out of 4

Prepare the angle

Create a right-angle by aligning the zero-point of the ruler with the long edge of your card.

Step 4 out of 4

Measure your nipple

Rest the bottom of your nipple on the ruler and against your card. Can you see where the the base of your nipple is widest? That’s your measurement. Make a note and repeat the step for your other nipple.

Step 1 out of 4

Download a digital ruler from your app store

We’ve chosen an app that we think will help you. This isn’t a Philips app, so be sure to review its terms, conditions and privacy policy. Click ‘Continue’ after your app is installed and set up.

Step 2 out of 4

Stimulate the nipple

Important! Don't skip this step. Find a comfortable, private area. Place your thumb and forefinger on your areola (the darker area around your nipple) and squeeze gently until it perks up.

Step 3 out of 4

Place your nipple

Rest your nipple on the phone screen. Align the zero-point to the left outer edge of your nipple, where it’s widest.

Step 4 out of 4

Measure your nipple

Can you see where the the base of your nipple is widest? That’s your measurement. Make a note and repeat the step for your other nipple.

Use your Nipple Sizing Card

Your pump comes with a Nipple Sizing Card. You’ll use it to measure your nipple size and receive our recommendation for your best fit. Important to know: Your nipples undergo changes during pregnancy. We advise you to size now and resize once you are a few weeks into your breastfeeding journey.

Use your Nipple Sizing Card

Your pump comes with a Nipple Sizing Card. You’ll use it to measure your nipple size and receive our recommendation for your best fit. Important to know: The best time of the day to measure your nipples is before you breastfeed or pump, or at least an hour after you’ve finished.

Use your Nipple Sizing Card

Your pump comes with a Nipple Sizing Card. You’ll use it to measure your nipple size and receive our recommendation for your best fit. Your nipples undergo a series of changes during pregnancy, postpartum and breastfeeding. It's worth checking periodically to ensure you're still using the right size.

Choose your measured nipple size

Every nipple size is normal, and it's common for your two nipples to be slightly different in size. If needed, select the size for one nipple first, then come back to select the other.

Choose your measured size

Every nipple size is normal, and it's common for your two nipples to be slightly different in size. If needed, select the size for one nipple first, then come back to select the other.