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Pump Smarter, Not Harder: Why Your Flange Size Could Be the Game-Changer You Need

Writer's picture: Paisley LucasPaisley Lucas

If you’ve ever felt frustrated, uncomfortable, or downright defeated by your breast pump, you’re not alone. Pumping is often painted as a convenient solution for modern moms, but the reality can feel far from easy. From juggling pump parts to figuring out if you’re doing it “right,” it’s no wonder so many of us feel like giving up.


But what if part of the struggle isn’t you—it’s your flange size? A new study has shed light on something that could make pumping a whole lot easier: finding the right fit for your body.


Why Flange Fit Matters:


Let’s talk about flanges. They’re the part of your breast pump that goes over your nipple, and they come in sizes ranging from small (about 10mm) to large (over 30mm). Most pumps come with standard sizes like 24mm or 27mm, and many of us just use whatever’s in the box. But here’s the catch: those sizes might not actually fit you.


When your flange doesn’t fit well, it can cause pain, reduce the amount of milk you’re able to pump, and turn an already tricky process into something you dread. This isn’t just about comfort—it’s about protecting your milk supply and your sanity.


A New Way to Find Your Fit:


The Flange FITSTM Guide is shaking up how we think about flange sizes. Instead of defaulting to larger sizes, this method starts with your nipple’s unique size and shape. It’s about trying different sizes during pumping and finding the one that feels good and works best for you.


A recent study compared this method to traditional sizing and found that moms using the smaller, tailored sizes reported:


• More comfort (no more gritting your teeth through pumping sessions!).

• Better milk output (hello, full bottles!).


In other words, when your flange actually fits, pumping can be less painful and more productive.


What This Means for You:


If pumping has been uncomfortable—or you’re worried you’re not producing enough milk—it’s worth checking your flange size. Here’s what you can do:

1. Measure Your Nipple: Use a ruler or calipers (or ask a lactation consultant for help).

2. Don’t Be Afraid to Experiment: Sometimes it takes trying a size or two smaller (or larger) to find your sweet spot.

3. Advocate for Yourself: If you’re working with a lactation professional, bring up the Flange FITSTM method and ask for guidance.


For Moms on the Fence About Pumping:


We get it—pumping can feel overwhelming. But finding the right tools can make a world of difference. Imagine pumping sessions that don’t leave you sore, with bottles that feel a little fuller. It’s not about perfection; it’s about making things just a little easier during this already busy and beautiful time.


Let’s Chat:


Have you struggled with pumping or flange fit? What’s worked for you? Share your experience in the comments—we’re here to learn from each other. Sources:Anders, L. A., Mesite Frem, J., & McCoy, T. P. (2024). Flange Size Matters: A Comparative Pilot Study of the Flange FITSTM Guide Versus Traditional Sizing Methods. Journal of Human Lactation. https://doi.org/10.1177/08903344241296036




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