In Stock
Willow

Willow Breast Pump Universal Sizing Kit

4.8 · 42 reviews
2,654 ₽

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 .

International delivery

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Returns & exchanges

Within 30 days of delivery

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 .

Customer reviews

4.0
The sizing chart is super

[This review was collected as part of a promotion.] The sizing chart is super helpful and the flanges fit great. I just wish there was a way to order the size I need and not the entire sizing kit.

9/25/2026
5.0
Easy to use- love that

[This review was collected as part of a promotion.] Easy to use- love that you get to try all of the sizes

9/8/2026
3.0
Works great with my spectra

[This review was collected as part of a promotion.] Works great with my spectra and is super easy clean. The beast bump sizing kit starts with too small of a size. Only one size works for me.

8/25/2026
1.0
Confusing. I’m a size 18mm

[This review was collected as part of a promotion.] Confusing. I’m a size 18mm regular flange but I’m suppose to use a 24 with the Willow according to the directions????

7/12/2026
5.0
Great addition to make pumping

[This review was collected as part of a promotion.] Great addition to make pumping unique to anyone. Didn’t think I needed custom sizing until I tried and was pleasantly surprised by the better fit.

6/21/2026
5.0
This was so nice to

[This review was collected as part of a promotion.] This was so nice to have to help during the pumping journey.

6/12/2026
5.0
I love that I can

[This review was collected as part of a promotion.] I love that I can get all sizes. Specially since each breast needs a different flange size. It is more cost effective to buy the sizing kit if you need two sets that are different sizes.

6/4/2026
5.0
So comfy and pretty!

I use the size 17 mm flange with my Spectra and have gotten better output! I do not have pain or ripped skin from suction. The edges of the flanges are like a flower and make it so much more comfy when removing the pumps, not to mention pretty!

5/28/2026
5.0
Highly recommended! Easy to use

[This review was collected as part of a promotion.] Highly recommended! Easy to use and follow. Super comfy!

5/27/2026
5.0
Fits into my pump perfect

[This review was collected as part of a promotion.] Fits into my pump perfect and the sizing chart took the guessing out of finding the right size!

5/22/2026