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 Insert - 15mm
$19.99
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$29.99
was $39.99 New lower price
4.7 out of 5 stars with 114 ratings
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$29.99
was $39.99 New lower price
4.7 out of 5 stars with 114 ratings
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Guests are saying
Guests appreciate the comfort and fit of these inserts, noting their effectiveness in enhancing milk output during pumping sessions. Many find them easy to clean and adjust, making them a practical choice for varying nipple sizes. However, some guests experienced issues with sizing and compatibility with certain pumps, which may require additional purchases. Overall, these inserts are seen as a valuable addition to the pumping experience, providing both comfort and functionality.
Summary created by AI from text of reviews reflecting recent feedback provided across different star ratings (includes incentivized reviews)
4.3 out of 5 stars with 570 reviews
design: 4.8 out of 5
easy to clean: 5 out of 5
safety: 4.86 out of 5
87% would recommend
8 recommendations
5 out of 5 stars
23 January, 2026
originally posted on onewillow.com
I love these. The material
[This review was collected as part of a promotion.] I love these. The material is very soft and comfortable
5 out of 5 stars
22 January, 2026
originally posted on onewillow.com
Sizing is great, however, for
[This review was collected as part of a promotion.] Sizing is great, however, for some reason I thought I was getting 2x sets of inserts and not 1 set.
5 out of 5 stars
8 January, 2026
originally posted on onewillow.com
LOVE that these have the
[This review was collected as part of a promotion.] LOVE that these have the size measurement on the outer bevels so you can easily tell which size they are!
5 out of 5 stars
4 January, 2026
originally posted on onewillow.com
I love how soft the
[This review was collected as part of a promotion.] I love how soft the flange inserts are. I personally prefer the willow inserts over any other ones.
5 out of 5 stars
30 December, 2025
originally posted on onewillow.com
I love these inserts!!!! I
[This review was collected as part of a promotion.] 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.
5 out of 5 stars
29 December, 2025
originally posted on onewillow.com
Love the quality and consistency
[This review was collected as part of a promotion.] Love the quality and consistency of these parts. Helps me feel better about my pumping process!
5 out of 5 stars
29 December, 2025
originally posted on onewillow.com
I love that these fit
[This review was collected as part of a promotion.] I love that these fit into 24mm flanges of other brands, too.
5 out of 5 stars
27 December, 2025
originally posted on onewillow.com
I use these with Willow
[This review was collected as part of a promotion.] I use these with Willow and also with my other (non-portable) pump. They work better than other inserts I’ve tried
5 out of 5 stars
20 December, 2025
originally posted on onewillow.com
These inserts make such a
[This review was collected as part of a promotion.] These inserts make such a huge difference in my pumping. I am so glad I got these because my pumping experience is way more abundant now!
5 out of 5 stars
19 December, 2025
originally posted on onewillow.com
Inserts are easy to use
[This review was collected as part of a promotion.] Inserts are easy to use and easy to find your size
5 out of 5 stars
18 December, 2025
originally posted on onewillow.com
These work perfectly for my
[This review was collected as part of a promotion.] These work perfectly for my pump. . SO much more comfortable and increased my output!
4 out of 5 stars
17 December, 2025
originally posted on onewillow.com
Works well but I wish
[This review was collected as part of a promotion.] Works well but I wish you offered different sizes in the original flange instead of having an additional piece to remember/clean.
5 out of 5 stars
15 December, 2025
originally posted on onewillow.com
these inserts are great. so
[This review was collected as part of a promotion.] these inserts are great. so thin and flexible you barely even know they’re there. having the right flange size is key and once i figured out what size was perfect for me my output is almost the same with the Go as it is with my spectra
5 out of 5 stars
8 December, 2025
originally posted on onewillow.com
Reminder these are supposed to
[This review was collected as part of a promotion.] Reminder these are supposed to be in the 24 flange set. Totally messed it up, otherwise works great.
5 out of 5 stars
27 November, 2025
originally posted on onewillow.com
Good purchase and helped with
[This review was collected as part of a promotion.] Good purchase and helped with the milk output thanks
5 out of 5 stars
25 November, 2025
originally posted on onewillow.com
Recommend buying the sizing insert
[This review was collected as part of a promotion.] Recommend buying the sizing insert set to anyone unsure of their size! It helped me decided which set was best without having to buy them all separately and will allow me to transition into a different size if needed without an additional purchase.
5 out of 5 stars
22 November, 2025
originally posted on onewillow.com
The sizing inserts are a
[This review was collected as part of a promotion.] The sizing inserts are a must! Definitely helped with my output.
5 out of 5 stars
19 November, 2025
originally posted on onewillow.com
These are great! No more
[This review was collected as part of a promotion.] These are great! No more buying multiple flanges to clutter the drying rack. 24mm flange and these are perfect. So comfortable and great to be able to change sizes as the breastfeeding journey goes on.
5 out of 5 stars
18 November, 2025
originally posted on onewillow.com
Bought these for my wife,
[This review was collected as part of a promotion.] Bought these for my wife, they greatly improve her comfort with her pumps
5 out of 5 stars
17 November, 2025
originally posted on onewillow.com
Love these! They fit perfectly
[This review was collected as part of a promotion.] Love these! They fit perfectly into the willow go and 360. They also can fit into any spectra 24 flanges.