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
WILLOW Breast Pump Sizing Kit - 12pc
New at target
$18.74 reg $24.99
Sale save $6.25 (25% off)
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- $8.24 - $13.49reg $10.99 - $17.99 Sale4.7 out of 5 stars with 60 ratings
- $18.74reg $24.99 Sale4.9 out of 5 stars with 62 ratings
- $16.49was $21.99 New lower price4.7 out of 5 stars with 321 ratings
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- $18.74reg $24.99 Sale4.9 out of 5 stars with 62 ratings
- $8.24 - $13.49reg $10.99 - $17.99 Sale4.7 out of 5 stars with 60 ratings
- $16.49was $21.99 New lower price4.7 out of 5 stars with 321 ratings
- $14.99reg $19.99 Sale3.4 out of 5 stars with 5 ratings
- $15.99reg $19.99 Sale4.1 out of 5 stars with 194 ratings
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Guests are saying
This flange sizing kit is a game changer for breastfeeding and pumping moms, offering a variety of comfortable inserts and a sizing tool to ensure the perfect fit. Guests appreciate the ease of use, clear instructions, and the ability to try multiple sizes without the hassle of returns. The kit is designed to adapt to changing sizes throughout the breastfeeding journey, making it an essential tool for new and experienced moms alike.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.9 out of 5 stars with 61 reviews
5 out of 5 stars
29 April, 2026
originally posted on onewillow.com
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!
5 out of 5 stars
26 April, 2026
originally posted on onewillow.com
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.
5 out of 5 stars
28 March, 2026
originally posted on onewillow.com
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!
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!
5 out of 5 stars
14 March, 2026
originally posted on onewillow.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.
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.
5 out of 5 stars
3 March, 2026
originally posted on onewillow.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!
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!
5 out of 5 stars
2 March, 2026
originally posted on onewillow.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!
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!
5 out of 5 stars
1 March, 2026
originally posted on onewillow.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!
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!
5 out of 5 stars
27 February, 2026
originally posted on onewillow.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!
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!
5 out of 5 stars
26 February, 2026
originally posted on onewillow.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
4 out of 5 stars
26 February, 2026
originally posted on onewillow.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 🙂
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:
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
5 out of 5 stars
25 February, 2026
originally posted on onewillow.com
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!!
5 out of 5 stars
25 February, 2026
originally posted on onewillow.com
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!