Willow Universal Pumping Sizing Insert, 13 mm
Willow Universal Pumping Sizing Insert, 13 mm
Hero image 0 of Willow Universal Pumping Sizing Insert, 13 mm, 0 of 5
Visit the Willow Store

Willow Universal Pumping Sizing Insert, 13 mm

4.7 stars out of 203 reviews
(4.7)|
203 ratings

Key item features

Sizing Inserts make pumping more comfortable for mothers with smaller flange sizes Improves fit and comfort for moms who need a flange size smaller than 21mm Flexible silicone material for a snug, secure fit Fits into Willow 3.0 and Willow Go 24mm Flanges and Containers only (sold separately) 
Nipple Measurements: 9-11mm nipple use Insert Size 13mm, 11-13mm nipple use Insert Size 15mm; 13-15mm nipple use Insert Size 17mm; 15-17mm nipple use Insert Size 19mm, 17-19mm nipple use Insert Size 21mm.  Easy to assemble and clean 2 pack Dishwasher safe Not made with BPA
Current price is $19.99
Price when purchased online
  • Free 90-day returns

How do you want your item?

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Thu, Feb 5
.
Order within 7 hr 41 min
Sold by Willow Innovations, Inc
Fulfilled by Walmart
3.823529411764706 stars out of 5, based on 17 seller reviews(3.8)
Report an issue with this seller
Free 90-day returns
walmart plus

Get free delivery, shipping and more*

*Restrictions apply
Try Walmart+ now

About this item

Product details

Specifications

Warranty

Compare with similar items

Comparison Overview:
Product

Viewing this item

Willow Universal Pumping Sizing Insert, 13 mm
Willow Universal Pumping Sizing Insert, 13 mm
current price $19.99
Willow Universal Pumping Sizing Insert, 13 mm
4.7 out of 5 Stars. 203 reviews
Momcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCS
Momcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCS
current price $19.99
Momcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCS
3 out of 5 Stars. 1 reviews
Medela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 Pack
Medela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 Pack
current price $20.05
Medela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 Pack
2 out of 5 Stars. 4 reviews
Maymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump Parts
Maymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump Parts
current price $19.09
Maymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump Parts
5 out of 5 Stars. 1 reviews
XIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
XIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
current price $7.44
XIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
Comparison Chart:
CompatibilityWillowWillow Universal Pumping Sizing Insert, 13 mmMomcozyMomcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCS-Medela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 PackelvieMaymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump PartsVariousXIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
Breast pump accessory set typeBreast Pump Accessory KitsWillow Universal Pumping Sizing Insert, 13 mmBreast Pump DiaphragmsMomcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCSBreast Pump Accessory KitsMedela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 PackBreast Pump Accessory KitsMaymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump PartsBreast Pump Accessory KitsXIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
Items includedFlangeWillow Universal Pumping Sizing Insert, 13 mmNoMomcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCS(2) silicone O-rings.Medela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 Pack2X 17 & 2X 19 mm insertsMaymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump Parts-XIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
MaterialFlexible siliconeWillow Universal Pumping Sizing Insert, 13 mmSiliconeMomcozy M5 Diaphragm, Original Breast Pump Replacement Accessories for M5, 2PCS-Medela Hands Free Collection Cups O-Rings Replacements for Breast Pump, 2 PackSiliconeMaymom 17&19mm Flange Insert Compatible with Elvie Single/Double Electric, Elvie Stride 24mm Wearable Cup, Not Original Elvie Stride Replacement Pump PartsSiliconeXIRQI 6pcs Updated Silicone Flange Insert 17mm Compatible with Various Breast Pumps for 24mm Flange/Shield, Breastfeeding Essential Replacement Pump Part
Now hiding additional rows in the Table

Customer ratings & reviews

4.7 out of 5 stars
stars203 ratings123 reviews
How item rating is calculated
  1. 5 stars84% (171)
  2. 4 stars6% (13)
  3. 3 stars3% (6)
  4. 2 stars3% (7)
  5. 1 star3% (6)
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 123 reviews

Dec 30, 2025
Eden R.
5 out of 5 stars review

Seller Verified Purchase

I love these inserts!!!! I have tried multiple other brands and these are so soft and very easy to clean. Plus the cute flower pattern is a nice touch. I would buy these again.

Incentivized Review
Review from http://onewillow.com
Helpful?6OONS8SXOSSO2977174348
Jan 9, 2026
Sidney C.
5 out of 5 stars review

Seller Verified Purchase

LOVE that these have the size measurement on the outer bevels so you can easily tell which size they are!

Incentivized Review
Review from http://onewillow.com
Helpful?6OONS8SXOSSO2977174348
Dec 27, 2025
Rachelle G.
5 out of 5 stars review

Seller Verified Purchase

I use these with Willow and also with my other (non-portable) pump. They work better than other inserts I've tried

Incentivized Review
Review from http://onewillow.com
Helpful?6OONS8SXOSSO2977174348