As a new mom, I was struggling with my breast pump's default flanges—they just didn’t fit right. Enter the Dwelio Flange Sizing Kit. The moment I unboxed it, I knew this was different. The 10 silicone inserts (13mm-21mm) felt soft yet durable, and the included nipple ruler was a lifesaver. No more guessing games!

I measured myself properly for the first time (turns out, I was way off before) and popped in the 17mm insert. The difference? Night and day. Suddenly, pumping wasn’t painful anymore, and my output increased noticeably within days. The inserts stayed securely in my 24mm Spectra flanges without slipping, even during longer sessions.

The cleaning brush became my unexpected MVP—scrubbing those tiny flange crevices is now a breeze. Pro tip: Test different sizes over a few days like I did; nipple size can fluctuate! While they didn’t work with my friend’s Momcozy pump (as noted in reviews), they’re perfect with my Spectra and Medela.

For under $20, this kit saved both my breastfeeding journey and my sanity. Skip the expensive single-size flanges—this is the smart choice.