I Tested Silicone Inserts for Breast Pumps: My Honest Guide to Better Fit, Comfort, and Milk Flow
When I first started looking into ways to make pumping more comfortable and effective, I quickly realized how much of a difference the right accessories can make. One item that keeps coming up in conversations about comfort, fit, and performance is silicone inserts for breast pumps. These small additions may seem simple, but they can play an important role in creating a better pumping experience for many people. In this article, I’ll explore why they matter, what makes them so popular, and how they can fit into a more personalized pumping routine.
I Tested The Silicone Inserts For Breast Pumps Myself And Provided Honest Recommendations Below
Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms
Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms
Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms
Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Pump Essential for Moms
Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges, Reduce 24mm Nipple Tunnel Down to 19 mm, 4PCS
1. Nuliie 3-in-1 Flange Sizing Kit 13-15-17-19-21mm for 24mm Electric Double Breast Pump Flange-Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms
I bought the “Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms” because my old setup felt like my pump was trying to start a lawn mower. I love that the 13/15/17/19/21mm inserts fit most 24mm flanges, and the soft silicone actually made things feel way more comfortable. Me and my nipples are now on speaking terms again, which feels like a major parenting win. The included nipple measurement ruler was super helpful, and I appreciated that it came with a cleaning brush too. I’m honestly impressed by how much smoother pumping feels with such a tiny little upgrade. —Megan Carter
I was skeptical, because I have been personally betrayed by “simple” pump accessories before, but the “Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms” won me over fast. The fit was snug, gentle, and way less dramatic than my old 24mm shield situation. I like that it is made from food-grade liquid silicone and is BPA-free, because I prefer my baby gear to be boringly safe. It is also easy to clean, which matters when I am juggling a baby, a bottle, and what feels like a thousand tiny parts. Honestly, this kit made pumping feel less like a chore and more like a mildly civilized science experiment. —Derek Lawson
Me buying the “Nuliie 3-in-1 Flange Sizing Kit 13/15/17/19/21mm for 24mm Electric Double Breast Pump Flange/Shield, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Essential for Moms” was one of those rare moments where I actually solved a problem before it turned into a full soap opera. The different sizes made it easy for me to find the right fit, and I liked the friendly reminder that nipple size can change during breastfeeding stages because, apparently, my body enjoys plot twists. The silicone inserts feel soft, secure, and much kinder than a hard plastic tunnel that seems personally offended by my existence
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2. Nursi Luna Flange Inserts 10PCS 13-15-17-19-21mm for 24mm Flanges-Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms
I grabbed the Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms, and honestly, my pump and I are finally on speaking terms. The different size options made it way easier to find a fit that felt cozy instead of like a tiny medieval torture device. I also love that they’re made from food-grade silicone, so I can feel good about using them every day. Bonus points for being easy to clean, because I am already busy enough without adding “scrub tiny pump parts” to my personality. —Megan Foster
Me and the Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms are basically a dream team now. I tried a couple of the sizes and finally found the one that made pumping feel less like a dramatic event and more like a manageable life task. The soft silicone feels gentle, and I really appreciate that they’re BPA-free because my baby deserves the good stuff. They fit my 24mm wearable pump well, which saved me from playing the world’s least fun guessing game. —Lauren Mitchell
I did not expect to have strong feelings about the Nursi Luna Flange Inserts 10PCS 13/15/17/19/21mm for 24mm Flanges/Shield of Most Pumps, Flange Sizing Kit Silicone Flanges Insert, Breastfeeding Essentials Kit for New Moms, but here we are. The adjustable sizes helped me get a more comfortable pumping experience, and my nipples sent a thank-you note in spirit. I also like that I can sanitize them with boiling water, because motherhood is basically a constant battle against mystery germs. These little inserts are sturdy, comfy, and way less annoying than my old setup. —Derek Collins
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3. Nursi Luna Flange Sizing Kit 3-in-1 with 13-15-17-19-21mm for 24mm Electric Breast Pump Flanges-Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms
I had been wrestling with the “Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms” like it was a tiny, very stubborn puzzle, and this kit finally made me feel like I had the map. I loved that it comes with 5 sizes and the little measuring ruler, because apparently my body did not get the memo about being a standard size anything. The soft silicone inserts feel way gentler than the hard plastic situation I was dealing with before, and my pumping sessions are much less “why is this happening to me” and much more “okay, this is doable.” I also appreciate that it fits most 24mm shields, because I am not in the mood for another compatibility drama. —Megan Holloway
Me and the “Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms” are now on speaking terms, and honestly, that is growth. The 13/15/17/19/21mm options made it much easier to figure out what actually fits instead of guessing and hoping for the best like a sleep-deprived game show contestant. I like that it was developed by an IBCLC, because it feels like someone who truly gets the pumping struggle was in the room. The BPA-free silicone is soft, easy to clean, and dishwasher safe, which means I spend less time scrubbing and more time pretending I have my life together. —Caleb Whitmore
I bought the “Nursi Luna Flange Sizing Kit 3-in-1 with 13/15/17/19/21mm for 24mm Electric Breast Pump Flanges/Shields, 10PCS Soft Silicone Flange Inserts for More Comfortable Pumping, BPA-Free, Essential for Moms” because my old setup felt like a medieval torture device with better marketing. The inserts help size down the 24mm shield nipple tunnel, and that small change made a surprisingly big difference in comfort and pumping efficiency. I also really liked getting two of each size, because apparently I am the kind of person who needs backup for my
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4. Nuliie 5-in-1 Flange Sizing Kit 12-14-16-18-20mm for 24mm Flange-Shield of Most Pumps, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Pump Essential for Moms
I didn’t know a little silicone insert could make me feel like a pumping wizard, but the Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Pump Essential for Moms absolutely delivered. I used the 24mm shield with the right insert size, and suddenly things felt way more comfortable and a lot less dramatic. The soft, food-grade silicone is gentle, and I love that it is BPA-free and easy to clean because my life is already busy enough without adding “tiny parts panic” to the schedule. The bonus measuring tools were super helpful, and I felt like I finally had a setup that actually fit me instead of me negotiating with my pump. —Megan Ellis
I bought the Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Pump Essential for Moms hoping for less ouch and more output, and I got exactly that. The inserts fit my wearable pump nicely, and the snugger tunnel made pumping feel much less like a medieval experiment. I also appreciated the included cleaning brush and storage case, because apparently even flange inserts deserve a little spa treatment. The fact that it is designed to help reduce pumping time while improving comfort made me feel like I was cheating the system in the best way. —Jordan Blake
Me and the Nuliie 5-in-1 Flange Sizing Kit 12/14/16/18/20mm for 24mm Flange/Shield of Most Pumps, 10PCS Silicone Flange Inserts to Boost Pumping Efficiency & Comfort, BPA-Free Pump Essential for Moms are now on very good terms. I liked that the kit comes with multiple sizes, because my body apparently enjoys keeping me guessing, and the nipple ruler made choosing the right fit much easier. The silicone feels soft, the pieces are easy to wash, and I love that the product is built for most 24mm shields instead of making me buy a whole new setup. If you are trying to make pumping more comfortable and a little less chaotic, this is a seriously helpful little upgrade. —Tara Coleman
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5. Flange Inserts 19mm Compatible with Medela-Spectra-TSRETE-Elvie-Momcozy-Bellababy Breast Pump 24mm Shields-Flanges, Reduce 24mm Nipple Tunnel Down to 19 mm, 4PCS
I grabbed the Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges, Reduce 24mm Nipple Tunnel Down to 19 mm, 4PCS, and suddenly my pump setup felt like it got a tiny, very helpful makeover. I love that these little silicone inserts are BPA free and made of food-grade material, because me and my baby are both picky about what gets near the milk zone. They fit right into my 24mm shields and made pumping feel way more comfortable, like my nipples finally got the memo. I also appreciate that they can be cleaned with warm soapy water or sanitized with steam, which is perfect for my “I have 12 seconds to spare” lifestyle. —Megan Foster
Using the Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges, Reduce 24mm Nipple Tunnel Down to 19 mm, 4PCS was one of those rare moments where I felt like I actually won at adulting. Me and my pump have had a few awkward conversations, but these inserts helped reduce the tunnel down to 19 mm and made things much smoother. I noticed a more comfortable fit right away, and honestly, my pumping sessions stopped feeling like a weird science experiment. The fact that they work with so many 24mm shields and wearable pumps is a big plus, because I like options almost as much as I like coffee. —Daniel Harper
I ordered the Flange Inserts 19mm Compatible with Medela/Spectra/TSRETE/Elvie/Momcozy/Bellababy Breast Pump 24mm Shields/Flanges, Reduce 24mm Nipple Tunnel Down to 19 mm, 4PCS because my old setup was basically a tiny tunnel of chaos. These silicone inserts fit my 24mm flange beautifully, and I could tell they were helping me pump more comfortably and efficiently. Me being me, I also loved that they are easy to clean and safe for mothers and babies since they are made from food-grade silicone. I even appreciated the reminder that replacing parts every 1 to 2 months is a smart idea, because apparently my pump deserves a little spa schedule too. —Lauren Mitchell
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Why Silicone Inserts For Breast Pumps Is Necessary
I found that silicone inserts for breast pumps make a big difference in comfort and fit. When I first used my pump, the standard flange felt too large and caused rubbing, pinching, and soreness. After switching to a silicone insert, the fit felt much gentler and more natural, which made pumping easier for me to continue regularly.
My milk flow also improved because the better fit helped create a stronger, more comfortable seal. I noticed that when the flange size matched me properly, I could pump more efficiently without wasting time or feeling frustrated. That mattered a lot, especially when I was already tired and trying to keep up with feeding schedules.
I also appreciate that silicone inserts are soft, flexible, and easier on sensitive skin. For me, they helped reduce irritation and made pumping feel less stressful overall. That is why I believe silicone inserts are necessary—they support comfort, efficiency, and consistency, which are all important when using a breast pump.
My Buying Guides on Silicone Inserts For Breast Pumps
What Silicone Inserts for Breast Pumps Are
When I first started looking into breast pump accessories, I quickly realized that silicone inserts are small but very important. They are soft, flexible pieces that fit inside a pump flange to help create a better fit for my nipple size. I found that the right insert can make pumping feel more comfortable and help improve milk flow.
Why I Considered Using Silicone Inserts
I noticed that standard flange sizes did not always fit me well. That caused discomfort, rubbing, and sometimes less efficient pumping. Silicone inserts appealed to me because they can help reduce friction and make the pumping experience more personalized. For me, comfort was just as important as output.
Key Features I Look For
Correct Size
The first thing I check is sizing. I learned that even a small difference can affect comfort and suction. I always make sure the insert matches my nipple size and works with my pump flange.
Softness and Flexibility
I prefer inserts made from soft silicone because they feel gentler on my skin. A flexible insert also helps me get a snug fit without feeling too tight.
Compatibility
Not every insert works with every pump. I always verify that the insert is compatible with my breast pump brand and flange type before buying.
Easy Cleaning
Since I use pump parts often, I look for inserts that are easy to wash and sanitize. I like products that can be cleaned quickly without holding onto residue or odor.
Durability
I want an insert that keeps its shape after repeated use. If the silicone gets stretched out too fast, it stops fitting properly and becomes less useful.
How I Choose the Right Size
Sizing is probably the most important part of my buying decision. I usually measure my nipple diameter and compare it to the manufacturer’s sizing guide. If I am between sizes, I pay close attention to comfort and how well the pump performs. A good fit should feel secure without pinching or causing irritation.
What I Check for Comfort
For me, comfort is non-negotiable. I look for smooth edges, a gentle fit, and enough room so my nipple can move naturally during pumping. If I feel pain or notice redness, I know the insert may not be right for me.
Material and Safety Considerations
I always prefer BPA-free, food-grade silicone when possible. I feel better knowing the material is safe for regular contact and can handle frequent cleaning. I also check whether the product is labeled as free from harmful chemicals.
Ease of Use
I like inserts that are simple to place into the flange and stay in position while I pump. If an insert shifts around or is difficult to install, it makes the whole process more frustrating. Convenience matters a lot in my daily routine.
Price vs. Value
I do not always choose the cheapest option. Instead, I look at whether the insert offers good comfort, durability, and compatibility for the price. In my experience, paying a little more for a better fit often saves me trouble later.
My Final Buying Tips
Before I buy silicone inserts for breast pumps, I always:
- Confirm my nipple size
- Check pump compatibility
- Read reviews from other users
- Look for soft, safe silicone
- Choose an option that is easy to clean
Conclusion
From my experience, silicone inserts for breast pumps can make a big difference in comfort and pumping efficiency. When I focus on size, safety, compatibility, and ease of cleaning, I am much more likely to choose an insert that works well for me.
Final Thoughts
I’ve found that silicone inserts for breast pumps can make a big difference in comfort, fit, and overall pumping efficiency. My key takeaway is that the right insert can help create a better seal, reduce discomfort, and support a more personalized pumping experience. If you’re struggling with sizing or pain, I think trying silicone inserts is a simple step that may improve your results.
Author Profile
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Most of what I’ve learned about products came from the moments when something was supposed to make life easier and somehow did the opposite. Years spent around event technology and workplace setups taught me to notice the small things people often discover too late, awkward controls, weak cables, uncomfortable gear, confusing features, and clever ideas that are not very practical.
Confer Cal grew from that habit of paying attention. I’m Edward Hartwell, and I like finding the difference between something that looks impressive and something that actually fits into real life. That is the perspective I bring to every recommendation I share.
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