Skip to main content

Breast Pump Sizing Kit

Regular price $24.99
Unit price
per 

Breast Pump Sizing Kit

Regular price $24.99
Unit price
per 
Find your perfect breast pump flange fit with a wide range of inserts designed for maximum pumping comfort and milk output.

Free shipping with code FREESHIP

Free shipping on orders $50+

Pay using HSA/FSA with flex Select Flex at checkout to pay for your HSA/FSA eligible items

Better pump fit, better milk flow.

5 Insert Sets for
Inclusive Sizing

Sizing Tool to
easily find your size

Pump Sizing 101 guide

Support via Sizing 
Specialist

How It Works

  • Measure your nipples either an hour before or an hour after nursing or pumping.
  • If your flange still doesn’t feel comfortable, experiment with the other inserts. (Also, make sure you’re wearing a snug but stretchy pumping bra!)
  • Book your session with a Willow Sizing Specialist if you need additional support

Bundle & Save

Mom-approved bundles for breast care, milk storage, and pumping on the go

Pump & Clean Anywhere Bundle
20% off
New
Willow Go® Pump and Anywhere Case
25% off
HSA/FSA
Glass Breast Milk Pitcher Duo
20% off
Travel Cleaning Duo
20% off
HSA/FSA

Learn from our experts

Frequently Asked Questions