Size Chart - S9 Pro

Nipple measurement Flange
11-13mm 15mm Insert
14-15mm 17mm Insert
16-17mm 19mm Insert
18-20mm 21mm Insert
21-23mm 24mm Flange
24-26mm 27mm Flange


We have such a guide exclusively to solve this problem of moms, you can check the guide on how to measure your flange size.

Please note, your breast size may change before pumping and after pumping, so please measure your size when you start pumping or the flange size may not be appropriate for you.

Find the 27mm flange here

Find the 15mm/17mm/19mm/21mm inserts here