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Key Takeaways
Customizable fit for wearable breast pumps with 24 mm standard flanges
Converts hard plastic flange opening down to 14 mm
Made from soft, food-grade silicone for comfort
Helps reduce nipple stretching and irritation
Enhances suction seal and pumping comfort for small nipples
Quick Overview
The 14 mm Inserts (1 Pair) are soft silicone reducers that slide inside standard 24 mm hard breast pump flanges, effectively resizing the opening to 14 mm. This allows pumpers with smaller or sensitive nipples to achieve a gentler, more precise fit — reducing discomfort, pulling, and wasted suction — especially on wearable pumps like Elvie and Elvie Stride.
Features & Benefits
Precise Fit Adjustment: Shrinks wide 24 mm flange openings to 14 mm, ideal for smaller nipples.
Wide Compatibility: Works with Elvie, Elvie Stride, Willow, Willow Go, Motif, Spectra, Medela, and other pumps that use 24 mm hard flange shields.
Comfort-Focused Silicone: Soft, food-grade silicone reduces irritation and tissue stretching during pumping.
Improved Suction Seal: A snug fit enhances the seal against the breast, which can improve suction efficiency and comfort.
Easy to Install & Clean: Simply insert into existing flange before pumping; remove and clean with warm soapy water as part of your normal care routine.
Product Details
Product Name: 14 mm Inserts (1 Pair) for Elvie & Wearable Breast Pumps
Material: Food-grade, BPA-free silicone
Size: 14 mm internal diameter when installed inside 24 mm flange
Compatibility: Any pump with standard 24 mm hard plastic flange (Elvie, Elvie Stride, Willow, Willow Go, Motif, Spectra, Medela, etc.)
Pack: Pair (2 inserts)
Care: Wash and sterilize between uses for optimal hygiene
How to Use
Insert the soft silicone adapter into your pump’s standard 24 mm flange before assembly.
Ensure the silicone edge lies flat and doesn’t block air paths.
Attach the rest of your pump components as usual.
Pump following standard device instructions — the resized opening creates a closer fit.
Clean inserts with warm water and mild soap after each use, and sterilize regularly.
Why Choose These Inserts Over Other Solutions?
Standard wearable pump flanges (such as those that come with Elvie pumps) usually have a wide, 24 mm opening that may not fit smaller nipples comfortably. These 14 mm silicone inserts offer a cost-effective, comfortable solution without needing to buy full replacement flanges. They help create a better suction seal and can reduce rubbing, stretching, and irritation — making pumping more comfortable and efficient.
FAQ
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Flange inserts are soft silicone adapters that reduce the internal diameter of standard 24 mm hard breast pump flanges, letting you achieve a closer, more comfortable fit if the default flange feels too wide. A proper fit helps reduce nipple irritation and can improve suction comfort.
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Yes — these 14 mm silicone inserts are designed to work with any pump that uses a standard 24 mm hard plastic flange, including Elvie pumps (Elvie, Elvie Stride), Medela, Spectra, Motif, Willow, Willow Go, and more.
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If your nipples feel like they have too much empty space in the flange tunnel, you experience rubbing or discomfort, or you feel like suction isn’t sealing well, a smaller flange opening like 14 mm may help. Measuring your nipple diameter (not the areola) while not engorged is a good way to determine fit, and sizing down by a few mm from your nipple measurement is a common practice.
Make an appointment with a lactation consultant at Bonnie Knows Breast to get your exact measurement!
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Many people find that a closer, more personalized fit reduces friction, minimizes nipple stretching, and feels more comfortable — especially during frequent or longer pumping sessions.
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These inserts don’t increase the pump’s suction force, but by creating a better seal and reducing tissue movement inside the flange, they can help you achieve more effective milk removal overall for some people. Optimal fit often supports more efficient expression.
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No — installation is simple: just press each silicone insert into your existing 24 mm hard flange before pumping. After use, remove them and wash with warm, soapy water, rinsing thoroughly. Regular cleaning and occasional sterilization keep them hygienic.
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No — these are aftermarket silicone inserts designed to be compatible with Elvie and other pumps with 24 mm hard flanges, but they are not original manufacturer replacement parts.
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Item deMany people use silicone flange inserts for all their pumping sessions once they find the right fit, but everyone’s comfort and anatomy are different. If irritation or discomfort continues, consider trying different insert sizes or consulting a lactation specialist.
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Yes — the soft food-grade silicone material is gentle against skin and can reduce friction and irritation compared with hard flanges alone, which is especially helpful for sensitive tissue.
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Always measure your nipples while not engorged to determine the best flange or insert size. Need help? Book an appointment with Bonnie Knows Breast.
Try different sizes if you don’t get a good seal initially — even a 1-2 mm change can make a difference.
Check the fit mid-session — if the nipple rubs on the side of the tunnel or suction breaks easily, a different size may help.