It's all about the fit
Boob maths: One size wearable pump + your personal size of insert or flange = a perfect fit package so you can express milk comfortably and effectively.
Let's get you measured up, follow the info below.
How to measure your nipple size
This is probably the first time you have had to distinguish between your nipple and areola and for most of us this is the first time we have had to place a measuring tape or ruler to our nipple.
Be sure to measure both sides, as nipple sizes can differ on each breast.
For the perfect fit add 3-4mm to your measurement, then check the chart below to choose your insert or flange.
What size insert you'll need
5-7 mm nipple
You'll need a 13mm insert
8-10 nipple
You'll need a 15mm insert
11-13 mm nipple
You'll need a 17mm insert
14-16 mm nipple
You'll need a 19mm insert
17-19 mm nipple
You'll need a 21mm insert
20 - 22 mm nipple
You'll need a 24mm flange. Good news, this size flange comes as standard in our wearable pump.
23 - 25 mm nipple
You'll need a 27mm flange.
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