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 - 19mm: Compatible with Generation 3, Silicone, 2-Pack
Highly rated
$19.99
In Stock
Eligible for registries and wish lists
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About this item
Additional product information and recommendations
Frequently bought together
Highly rated
$6.99 - $13.99
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4.5 out of 5 stars with 10799 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 593 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
19 March, 2026
originally posted on onewillow.com
These feel so much softer
[This review was collected as part of a promotion.] These feel so much softer than other inserts I've tried. Love them
1 out of 5 stars
19 March, 2026
originally posted on onewillow.com
The willow is not working
[This review was collected as part of a promotion.] The willow is not working for me. I have only been able to get one ounce with a pumping session compared to 5 oz with the spectra. I tried a different flange size and this made no difference. I also tried different bras. Very disappointing especially for the price even with my insurance!
5 out of 5 stars
18 March, 2026
originally posted on onewillow.com
soft, comfortable and well-fitting. The
[This review was collected as part of a promotion.] soft, comfortable and well-fitting. The sizing guide was super helpful and accurate
5 out of 5 stars
16 March, 2026
originally posted on onewillow.com
These are very helpful especially
[This review was collected as part of a promotion.] These are very helpful especially since each nipple isn’t necessarily the same size. I get a better pumping experience with them and it is very comfortable
5 out of 5 stars
14 March, 2026
originally posted on onewillow.com
Perfect fit! Use for my
[This review was collected as part of a promotion.] Perfect fit! Use for my spectra, momcozy, and willow pumps!
5 out of 5 stars
2 March, 2026
originally posted on onewillow.com
I like it! I didn’t
[This review was collected as part of a promotion.] I like it! I didn’t know I need it, my output is so much better after adding this. The material looks great.
3 out of 5 stars
2 March, 2026
originally posted on onewillow.com
Does not consistently work because
[This review was collected as part of a promotion.] Does not consistently work because it does not always create a seal.
5 out of 5 stars
24 February, 2026
originally posted on onewillow.com
Happy for these inserts. They
[This review was collected as part of a promotion.] Happy for these inserts. They are so comfortable and ensure that i can pump until the last drop as it’s the proper fit for my nipple.
5 out of 5 stars
11 February, 2026
originally posted on onewillow.com
Works great. Make sure you
[This review was collected as part of a promotion.] Works great. Make sure you have the 24mm size for the inserts. These inserts feel better with use than the ones I have for my plug in pump.
5 out of 5 stars
2 February, 2026
originally posted on onewillow.com
Exactly what I ordered! Wish
[This review was collected as part of a promotion.] Exactly what I ordered! Wish these were included with the pump because I ended up having to order several pairs to find the size that worked best for me
2 out of 5 stars
29 January, 2026
originally posted on onewillow.com
Decently comfortable inserts but overall
[This review was collected as part of a promotion.] Decently comfortable inserts but overall this pump does not give me very good output
5 out of 5 stars
28 January, 2026
originally posted on onewillow.com
Most Comfotable flange inserts I’ve
[This review was collected as part of a promotion.] Most Comfotable flange inserts I’ve used for my exclusively pumping journey
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