I was having a ton of issues with sore nipples after pumping, after speaking with my OBGYN and doing some research learned nipple sizes change throughout postpartum. Purchasing these have saved me from sore nipples and doesn’t make me dread pumping anymore. The one downside is that some milk does get caught in between the insert and the pump piece, but I either remove the sizing insert before flip to finish or I put the sizing insert on top of the bottle to act as a funnel and save any leftover milk that way (there isn’t typically a lot, only a few drops).

The sizing inserts from willow are great. They fit perfectly in the 24 mm size container and really help customize my pump!

These inserts work great and are so versatile! I use them for my Willows, Elvies and my Medela Symphony. They fit into any standard size 24mm flange, so I have 3 sets!

Not to mention any inserts smaller than 19 or 17mm are hard to find and these are relatively affordable and seem to be very durable as well when compared to some other silicone inserts.

overall great product and highly recommended by this first time mother on her breastfeeding journey

These work and fit well. Super soft and help make sure there is a snug latch.

There the only ones that work! Maymomm inserts are a different kind of a silicone and anytime I put them on my willow or other pumps I do not get any milk output. Thank god for willow inserts 😊