Sizing Inserts
HSA/FSA
Sizing Inserts
Sizing Inserts
Sizing Inserts
HSA/FSA
Sizing Inserts
Sizing Inserts

Willow® Sizing Insert Set
(2-pack)

$19.99$15.99

Our breast pump sizing inserts are designed to help optimize comfort and output for moms who measure smaller than 21mm.


Available in sizes 13mm, 15mm, 17mm, 19mm and 21mm for use with 24mm Willow flanges and containers.


Did you know: you should replace pump parts every three months for optimal performance. Normal wear and tear can impact suction and output! Having extras on hand is helpful in the event that you lose a part, too.

Select a size
What's my size?
  • 13mm
  • 15mm
  • 17mm
  • 19mm
  • 21mm
Free shipping on orders over $69

2 ways to pays with

Insurance & HSA/FSA

  • FSA/HSA reimbursements eligible