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WILLOW Breast Pump Sizing Kit - 12pc - 2 of 4WILLOW Breast Pump Sizing Kit - 12pc - 3 of 4WILLOW Breast Pump Sizing Kit - 12pc - 4 of 4
WILLOW Breast Pump Sizing Kit - 12pc - 1 of 4

WILLOW Breast Pump Sizing Kit - 12pc

$18.74 reg $24.99
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At a glance

About this item

Highlights

  • "Our Sizing Kit makes it easy to:
  • Take nipple measurements, experiment with sizing inserts and Access expert-backed education
  • Connect with a Sizing Specialist for personalized guidance
  • Use with any pump; they’re compatible with almost all 24mm flanges
  • Fit most nipple sizes"

Description

Find your perfect breast pump flange fit with a wide range of inserts designed for maximum pumping comfort and milk output.

When it comes to breast pumps, fit really matters. Proper fit leads to comfort, and comfort leads to more milk output — and fit starts with your flange. Did you know that your nipple size changes from pregnancy throughout your postpartum journey? It even changes before and after nursing or pumping! A close, comfortable fit promotes comfort and milk output.
Number of Pieces: 12
Material: Silicone
Care & Cleaning: Dishwasher-Safe
TCIN: 94747335
UPC: 810104131254
Item Number (DPCI): 030-05-4515
Origin: Imported
If the item details aren’t accurate or complete, we want to know about it.

willow

breast-pumps
Size Base of Nipple Measurement
21mm 17-19 mm
24mm 20-22 mm
27mm 23-25 mm

All Sizes in Inches Unless Otherwise Stated

Shipping details

Estimated ship dimensions: 2 inches length x 7.3 inches width x 5.6 inches height
Estimated ship weight: 2.3 pounds

Return details

This item can be returned to any Target store or Target.com.
This item must be returned within 90 days of the date it was purchased in store, delivered to the guest, delivered by a Shipt shopper, or picked up by the guest.
See the return policy for complete information.

Q: What material is used for the sizing inserts?

submitted by AI Shopping Assistant - 29 days ago

  • A: The sizing inserts are made from silicone, ensuring comfort and durability.

    submitted byAI Shopping Assistant - 29 days ago
    Ai generated

Q: Is the sizing kit dishwasher-safe for cleaning?

submitted by AI Shopping Assistant - 29 days ago

  • A: Yes, all components of the sizing kit are dishwasher-safe for easy cleaning.

    submitted byAI Shopping Assistant - 29 days ago
    Ai generated

Q: How many pieces are there in the sizing kit?

submitted by AI Shopping Assistant - 29 days ago

  • A: The sizing kit consists of a total of 12 pieces designed for optimal fitting.

    submitted byAI Shopping Assistant - 29 days ago
    Ai generated

Q: What is the purpose of taking nipple measurements?

submitted by AI Shopping Assistant - 29 days ago

  • A: Taking measurements helps find the right flange size, enhancing comfort and milk output.

    submitted byAI Shopping Assistant - 29 days ago
    Ai generated

Q: Can I use this kit with any breast pump?

submitted by AI Shopping Assistant - 29 days ago

  • A: Yes, the sizing kit is compatible with almost all breast pumps using 24mm flanges.

    submitted byAI Shopping Assistant - 29 days ago
    Ai generated
See all questions (5)

Additional product information and recommendations

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4.9 out of 5 stars with 60 reviews
5 out of 5 stars
29 April, 2026
originally posted on onewillow.com
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Cute and useful!

I had no idea what the proper size flange is key for maximum output. My Spectra only had size 21 and 24 while the Willow kit put me on a size 17. After speaking with my lactation consultant, I learned the sizing kit was perfect for small girls like me!
Annie
Did you find this review helpful?
5 out of 5 stars
26 April, 2026
originally posted on onewillow.com
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These work wonderful, don’t slip

[This review was collected as part of a promotion.] These work wonderful, don’t slip and easy to clean.
DARBY W.
Did you find this review helpful?
5 out of 5 stars
28 March, 2026
originally posted on onewillow.com
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Takes the guesswork out of

[This review was collected as part of a promotion.] Takes the guesswork out of what size I needed. Comes with a size guide!
Tirzah L.
Did you find this review helpful?
5 out of 5 stars
28 March, 2026
originally posted on elvie.com

Takes the guesswork out of

Takes the guesswork out of what size I needed. Comes with a size guide!
Tirzah L.
Did you find this review helpful?
5 out of 5 stars
14 March, 2026
originally posted on onewillow.com
Image

Helpful convenient sizing kit

Very convenient to have one product that makes it easy to determine what size you are without having to buy and return multiple products until you find the correct fit.
Bree
Did you find this review helpful?
5 out of 5 stars
14 March, 2026
originally posted on elvie.com

Helpful convenient sizing kit

Very convenient to have one product that makes it easy to determine what size you are without having to buy and return multiple products until you find the correct fit.
Bree
Did you find this review helpful?
5 out of 5 stars
3 March, 2026
originally posted on onewillow.com
Image

Sizing Kit Review

The sizing inserts are perfect for getting the right flange size! They are super comfortable. The best part is having a variety of sizes to try. This helped find the perfect fit. I highly recommend this product!
Britney H.
Did you find this review helpful?
5 out of 5 stars
3 March, 2026
originally posted on elvie.com

Sizing Kit Review

The sizing inserts are perfect for getting the right flange size! They are super comfortable. The best part is having a variety of sizes to try. This helped find the perfect fit. I highly recommend this product!
Britney H.
Did you find this review helpful?
5 out of 5 stars
2 March, 2026
originally posted on onewillow.com
Image

Breast pump sizing kit

This is my third baby and I was making it priority the third time around to have the correct size met for me. This kit made it incredibly easy, wish I would’ve done it sooner. Great product!
Shawna
Did you find this review helpful?
5 out of 5 stars
2 March, 2026
originally posted on elvie.com

Breast pump sizing kit

This is my third baby and I was making it priority the third time around to have the correct size met for me. This kit made it incredibly easy, wish I would've done it sooner. Great product!
Shawna
Did you find this review helpful?
5 out of 5 stars
1 March, 2026
originally posted on onewillow.com
Image

Such a handy kit!

This kit is so handy for a newly breastfeeding mom! My flange size changed throughout my first time breastfeeding so I anticipate that happening again with my second. It’ll be handy as I continue to breastfeed and need to adjust sizes. I also like having all the sizes in the kit so I can try out which one works best. I highly recommend this flange kit!
Savannah
Did you find this review helpful?
5 out of 5 stars
1 March, 2026
originally posted on elvie.com

Such a handy kit!

This kit is so handy for a newly breastfeeding mom! My flange size changed throughout my first time breastfeeding so I anticipate that happening again with my second. It'll be handy as I continue to breastfeed and need to adjust sizes. I also like having all the sizes in the kit so I can try out which one works best. I highly recommend this flange kit!
Savannah
Did you find this review helpful?
5 out of 5 stars
27 February, 2026
originally posted on onewillow.com
Image

Breast Pump Sizing Kit

This kit was so nice to have at the hospital when baby was born this week! The hospital didn't have my correct size available but luckily I brought this kit with me. The willow inserts are very comfortable as well!
Cassidy G.
Did you find this review helpful?
5 out of 5 stars
27 February, 2026
originally posted on elvie.com

Breast Pump Sizing Kit

This kit was so nice to have at the hospital when baby was born this week! The hospital didn't have my correct size available but luckily I brought this kit with me. The willow inserts are very comfortable as well!
Cassidy G.
Did you find this review helpful?
5 out of 5 stars
26 February, 2026
originally posted on onewillow.com
Image

Convenient & easy to understand

This is a great kit with easy instructions on how to size yourself . I love the material of the flanges and how the kit comes with several sizes
Shara C.
Did you find this review helpful?
4 out of 5 stars
26 February, 2026
originally posted on onewillow.com
Image

Made sizing easy

This sailing kit came with all the bells and whistles compared to others! Not only did I get the traditional paper sizing cut out but also flanges to trial. The kit included a 1:1 consult with a specialist which I thought was amazing! I now have my correct flange sizes and am excited to pump with them 🙂
Sofia M.
Did you find this review helpful?
4 out of 5 stars
26 February, 2026
originally posted on elvie.com

Made sizing easy

This sailing kit came with all the bells and whistles compared to others! Not only did I get the traditional paper sizing cut out but also flanges to trial. The kit included a 1:1 consult with a specialist which I thought was amazing! I now have my correct flange sizes and am excited to pump with them :slightly_smiling:
Sofia M.
Did you find this review helpful?
5 out of 5 stars
26 February, 2026
originally posted on elvie.com

Convenient & easy to understand

This is a great kit with easy instructions on how to size yourself . I love the material of the flanges and how the kit comes with several sizes
Shara C.
Did you find this review helpful?
5 out of 5 stars
25 February, 2026
originally posted on onewillow.com
Image

Really nice, NECESSARY, little kit!

This flange sizing kit is really convenient. It’s honestly one of the best ideas ever. They’re very comfortable inserts in a range of sizes. I would definitely recommend to a new (or experienced!) mom!!
Desirae
1 guest found this review helpful. Did you?
5 out of 5 stars
25 February, 2026
originally posted on onewillow.com
Image

Great for beginners

Where was this 15 yrs ago when I was a new mom. After discovering Willow 3 yrs ago this new size box is perfect for any pump and any nursing mama! This is so easy to determine proper sizing. It works well considering all you need for that perfect size is all in 1 box! I highly recommend to anyone starting their breast feeding/pumping journey!
Nicole M.
Did you find this review helpful?

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