Find your size in 2 minutes.
The right flange size means more comfort and more efficient pumping. Get our free ruler, print it and measure yourself calmly at home.
100% free · Sizes from 11 to 24 mm · Help on WhatsApp
- 100% freesent by email
- From 11 to 24 mmto the millimetre
- Both sideseach breast has its own size
- Not sure?we answer on WhatsApp
Get your ruler by email.
Enter your email: the ruler arrives in your inbox in seconds, ready to print.
How to measure yourself.
Print at 100%
Print the ruler at actual size, without scaling, then cut out the openings.
Measure at the base
Ideally an hour after a feed or pumping session. Measure the nipple at its base, without the areola and without squeezing it.
Both sides
Repeat on the other breast: sizes can differ, it's common.
Your exact size
Start with the size closest to your measurement, then check comfort while pumping.
Got your measurements? Here's your size.
Choose your breast pump and enter the measurement of each nipple: we'll tell you if your size is already included or which insert to add.
Not measured yet? Get the free ruler or ask us on WhatsApp.
size already included with the pump
Too big, or too small?
The wrong size can cause pain, less milk pumped and less efficient sessions.
Your questions, our answers
Why is flange size so important?
Flange size is key to optimal comfort and efficient milk expression. The wrong size can cause pain, reduced milk flow and a less effective breast pump.
Is the ruler really free?
Yes, 100% free. You receive it by email and print it at home.
Should I choose my exact size?
In most cases, yes. We recommend starting with your exact size, as it usually gives the best balance of comfort and efficiency. Some mums feel better with a slight adjustment, depending on nipple sensitivity or elasticity.
What if I'm between two sizes?
Start with the one closest to your actual measurement, or take both. Our team can also help you on WhatsApp.
Can my size change during breastfeeding?
Yes, it can change over time. Measure again if what you feel changes.
Unsure about your measurement? Message us on WhatsApp →
Hi, I measured 17 mm on the left and 18 on the right, is that normal?
Absolutely, it's very common! Get one 17 mm insert and one 18 mm.
Thanks, ordering now!
A question? We're here for you.
Choosing your size, getting started, your first session: our breastfeeding-trained team advises you before and after you buy.