What’s worse than a pump that pulls instead of fits? You know the answer if you’ve ever winced through a session. The right flange changes everything, from comfort to output, and we’ve rounded up ten options that finally get it right.
| Maymom Wide Neck Flange for Spectra (19mm) |  | Best Small Size | Size Options: 19mm | Material: BPA-free plastic | Compatibility: Spectra S1/S2 Plus, 9 Plus, Motif Luna, Ameda Mya | VIEW LATEST PRICE | Read Our Analysis |
| Nursi Luna 10-Piece Flange Sizing Kit |  | Most Versatile | Size Options: 13mm, 15mm, 17mm, 19mm, 21mm (inserts) | Material: BPA-free food-grade liquid silicone | Compatibility: Most 24mm electric and manual pump flanges | VIEW LATEST PRICE | Read Our Analysis |
| Nursi Luna Flange Sizing Kit for 24mm Breast Pumps |  | Editor’s Choice | Size Options: 13mm, 15mm, 17mm, 19mm, 21mm (inserts) | Material: BPA-free food-grade silicone | Compatibility: Most 24mm electric and manual pump flanges | VIEW LATEST PRICE | Read Our Analysis |
| Flange Insert Set for Breast Pumps (10 Pack) |  | Best Value | Size Options: 13mm, 15mm, 17mm, 19mm, 21mm (inserts) | Material: BPA-free food-grade silicone | Compatibility: Momcozy, Medela, Spectra, Willow, Elvie (24mm flanges) | VIEW LATEST PRICE | Read Our Analysis |
| Maymom MyFit Shields for Medela Breast Pump |  | Professional Grade | Size Options: 17mm (available 9mm-28mm) | Material: BPA and DEHP-free material | Compatibility: Medela Pump in Style, Symphony, FreeStyle, Sonata, Harmony; Lansinoh pumps | VIEW LATEST PRICE | Read Our Analysis |
| Lansinoh Breast Pump Flanges 21mm 2 Count |  | Best Overall | Size Options: 21mm (available 21mm-36mm) | Material: Plastic with soft flexible rim | Compatibility: Lansinoh manual, Signature Pro, Smartpump | VIEW LATEST PRICE | Read Our Analysis |
| Maymom 19mm Flange & Duckbill Valve for Spectra |  | Best Compatibility | Size Options: 19mm (available 13mm-32mm) | Material: BPA and DEHP-free material | Compatibility: Spectra S1, S2, 9 Plus | VIEW LATEST PRICE | Read Our Analysis |
| Nursi Luna Flange Sizing Kit for 24mm Pumps |  | Best For Beginners | Size Options: 13mm, 15mm, 17mm, 19mm, 21mm (inserts) | Material: BPA-free food-grade liquid silicone | Compatibility: Most 24mm electric and manual pump flanges | VIEW LATEST PRICE | Read Our Analysis |
| Nuliie Silicone Flange Inserts 10-Pack for Spectra |  | Budget-Friendly Pick | Size Options: 13mm, 15mm, 17mm, 19mm, 21mm (inserts) | Material: BPA-free food-grade liquid silicone | Compatibility: Most 24mm flanges for electric double and manual pumps | VIEW LATEST PRICE | Read Our Analysis |
| Nenesupply 19mm Oval Flanges for Medela Pumps |  | Most Comfortable | Size Options: 19mm (available 17mm, 19mm, 21mm) | Material: BPA and DEHP-free material | Compatibility: Medela Pump in Style, Symphony, Swing Maxi, Harmony, Personalfit Flex | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Maymom Wide Neck Flange for Spectra (19mm)
If you measure 17-18mm after pumping, this flange offers a precise, small fit. You’re getting two wide mouth flanges here, built for Spectra S1/S2 Plus, 9 Plus, Motif Luna, and Ameda Mya pumps. They’re BPA-free, FDA-compliant, and you can toss them on the top rack or steam sterilize them without worry.
They work with Spectra, AVENT, or Maymom wide mouth bottles, but not other brands. So, measure that nipple post-pump, then match your bottles carefully. You’re getting a solid, safe replacement, just not an original Spectra part. That’s fine, it does the job!
- Size Options:19mm
- Material:BPA-free plastic
- Compatibility:Spectra S1/S2 Plus, 9 Plus, Motif Luna, Ameda Mya
- Cleaning Method:Dishwasher top-rack safe, steam sterilization safe
- Included Accessories:2 flanges, wide mouth flange
- Replacement Interval:Not specified
- Additional Feature:Not original Spectra parts
- Additional Feature:For 17-18mm nipple diameter
- Additional Feature:AVENT bottle compatible
Nursi Luna 10-Piece Flange Sizing Kit
You’re looking for the most versatile flange option available, and the Nursi Luna 10-Piece Flange Sizing Kit delivers exactly that. Developed by an IBCLC, it comes with five silicone insert sizes: 13mm, 15mm, 17mm, 19mm, and 21mm, plus two of each. That’s ten pieces total.
- Compatibility: Fits most 24mm electric and manual flanges, but not 27-28mm shields.
- Materials: BPA-free, food-grade liquid silicone feels softer than hard plastic, reducing rubbing and discomfort.
- Measurement: Includes a nipple measuring ruler and detailed instructions. Measure before and after pumping, since your size can change over time.
- Maintenance: Reusable, dishwasher safe, and a sponge brush helps clean them. Replace every two months for best suction.
You’ll adjust your nipple tunnel size easily, making pumping smoother from the start. No more guessing!
- Size Options:13mm, 15mm, 17mm, 19mm, 21mm (inserts)
- Material:BPA-free food-grade liquid silicone
- Compatibility:Most 24mm electric and manual pump flanges
- Cleaning Method:Dishwasher safe
- Included Accessories:10 inserts (2 per size), nipple measuring ruler, instructions
- Replacement Interval:Every 2 months
- Additional Feature:Developed by IBCLC
- Additional Feature:Includes nipple measuring ruler
- Additional Feature:Replace every two months
Nursi Luna Flange Sizing Kit for 24mm Breast Pumps
The Nursi Luna Flange Sizing Kit is our editor’s choice for solving flange fit issues. If you’re using 24mm breast pumps, you’re in luck. This kit gives you ten soft silicone inserts in sizes 13, 15, 17, 19, and 21mm. And yes, you get two of each. That means you can fit both breasts precisely. No more guessing. The included nipple measurement tool makes finding your size quick and foolproof.
These inserts are BPA-free, food-grade silicone: soft, gentle, and efficient. You’ll get a secure seal and better suction. Plus, a sponge brush helps with cleaning. Boil them for easy sanitization. Comfort? You’ll feel it every session.
- Size Options:13mm, 15mm, 17mm, 19mm, 21mm (inserts)
- Material:BPA-free food-grade silicone
- Compatibility:Most 24mm electric and manual pump flanges
- Cleaning Method:Boiling water sanitization, dishwasher safe
- Included Accessories:10 inserts (2 per size), nipple measurement tool, sponge brush
- Replacement Interval:Every 1-2 months
- Additional Feature:Soft, cushioned silicone inserts
- Additional Feature:Includes nipple measurement tool
- Additional Feature:Sanitizable with boiling water
Flange Insert Set for Breast Pumps (10 Pack)
For anyone juggling multiple pump brands or struggling with flange fit, this 10 pack offers surprising value. You get five size pairs (13mm, 15mm, 17mm, 19mm, 21mm) plus a measuring tool and cleaning brush. That’s ten inserts total, so you’ve got backups handy. They’re made from soft, BPA free silicone that feels gentle on delicate skin. Plus, they work with most 24mm flanges from Momcozy, Medela, Spectra, Willow, or Elvie. Just avoid 27mm or 28mm shields.
To find your perfect fit, use the included ruler. Measure your nipple before pumping. A snug but not painful fit boosts output and cuts pumping time. Wash them after each use with mild soap and water. They’re also top rack dishwasher safe. Replace every two months for best results.
- Size Options:13mm, 15mm, 17mm, 19mm, 21mm (inserts)
- Material:BPA-free food-grade silicone
- Compatibility:Momcozy, Medela, Spectra, Willow, Elvie (24mm flanges)
- Cleaning Method:Dishwasher top-rack safe, hand wash with included brush
- Included Accessories:10 inserts (2 per size), nipple measuring tool, cleaning brush
- Replacement Interval:Every 2 months
- Additional Feature:Includes cleaning brush
- Additional Feature:Replace every 2 months
- Additional Feature:Reduces friction and soreness
Maymom MyFit Shields for Medela Breast Pump
Small nipples needn’t mean limited options. You can get a perfect fit with Maymom MyFit Shields, specifically the 17 mm size for nipple diameters around 15-16 mm post pumping. These two-piece breastshields work with your Medela Pump in Style, Symphony, FreeStyle, or Sonata, plus they replace Lansinoh flanges.
Made from BPA and DEHP free materials, these are FDA registered and meet EU standards. You can boil or steam clean them. They come in retail polybags, but remember: connectors aren’t included. Choose from sizes 9 mm to 28 mm for a glove like fit.
- Size Options:17mm (available 9mm-28mm)
- Material:BPA and DEHP-free material
- Compatibility:Medela Pump in Style, Symphony, FreeStyle, Sonata, Harmony; Lansinoh pumps
- Cleaning Method:Boiling water or steam cleaning
- Included Accessories:2-piece breastshield set (no connectors)
- Replacement Interval:Not specified
- Additional Feature:Two-piece breastshield set
- Additional Feature:FDA registered (No. D192549)
- Additional Feature:Available 9mm to 28mm
Lansinoh Breast Pump Flanges 21mm 2 Count
Lansinoh’s 21mm flanges are a top overall choice for mothers with smaller nipples. They feature a soft, flexible rim that hugs your curves without digging in, creating a secure seal for efficient pumping. You’ll get two flanges per pack, compatible with Lansinoh Manual, Signature Pro, and Smartpump models. Need a different size? No problem. They come in five options from 21mm up to 36mm. For cleaning, just wash them with warm soapy water or pop them in the dishwasher. Lansinoh’s been supporting moms for nearly 40 years, so you’re in good hands.
- Size Options:21mm (available 21mm-36mm)
- Material:Plastic with soft flexible rim
- Compatibility:Lansinoh manual, Signature Pro, Smartpump
- Cleaning Method:Warm soapy water or dishwasher
- Included Accessories:2 flanges
- Replacement Interval:Not specified
- Additional Feature:Soft, flexible rim design
- Additional Feature:Climate neutral by 2030
- Additional Feature:Available in five sizes
Maymom 19mm Flange & Duckbill Valve for Spectra
Maymom’s 19mm flange and duckbill valve set delivers near seamless compatibility with Spectra S1, S2, and 9 Plus pumps. You’re getting two sets each of X-Small flanges and valves, all BPA and DEHP free, FDA compliant for food contact. They fit Spectra wide-neck bottles, Avent bottles, and Maymom wide-mouth bottles too. Duckbill valves plug in and remove easily, with durable build and multiple color options. Clean them in the dishwasher, boiling water, microwave steam bags, or water steam. Just choose your flange size from 13mm to 32mm for a comfortable, efficient fit.
- Size Options:19mm (available 13mm-32mm)
- Material:BPA and DEHP-free material
- Compatibility:Spectra S1, S2, 9 Plus
- Cleaning Method:Dishwasher, boiling water, microwave-steam bag, water steam safe
- Included Accessories:2 flange sets, 2 duckbill valves
- Replacement Interval:Not specified
- Additional Feature:Includes duckbill valves
- Additional Feature:Multiple color options
- Additional Feature:Sizes 13mm to 32mm
Nursi Luna Flange Sizing Kit for 24mm Pumps
If you’re a new parent figuring out pumping, the Nursi Luna Flange Sizing Kit for 24mm Pumps is an ideal starting point. Developed by an IBCLC, it takes the guesswork out of sizing. You’ll get five silicone inserts: 13mm, 15mm, 17mm, 19mm, and 21mm. Just slip one into your 24mm flange for a custom fit. Plus, it comes with a precision ruler and a clear guide for measuring. The BPA-free, food-grade silicone is soft and reduces friction, making pumping way more comfortable. And because your nipples change over time, you can easily swap sizes. Just replace inserts every one to two months for consistent results.
- Size Options:13mm, 15mm, 17mm, 19mm, 21mm (inserts)
- Material:BPA-free food-grade liquid silicone
- Compatibility:Most 24mm electric and manual pump flanges
- Cleaning Method:Dishwasher safe
- Included Accessories:5 silicone inserts (2 per size), nipple measurement tool, instruction manual
- Replacement Interval:Every 1-2 months
- Additional Feature:Developed by IBCLC
- Additional Feature:Includes precision ruler
- Additional Feature:Replace every 1-2 months
Nuliie Silicone Flange Inserts 10-Pack for Spectra
For budget conscious moms, the Nuliie Silicone Flange Inserts 10-Pack is the best choice among these flanges. You get five sizes (13, 15, 17, 19, 21mm) to fit your 24mm pump flanges, plus a free nipple measurement ruler. They’re made from soft, BPA free silicone that’s dishwasher safe. But remember, they’re not for 27-28mm shields. Replace them every two months for best performance. A cleaning brush is included, so maintenance is simple. And if you’re unsure about your size, start with this multi-size set. Nuliie’s customer support is responsive too.
- Size Options:13mm, 15mm, 17mm, 19mm, 21mm (inserts)
- Material:BPA-free food-grade liquid silicone
- Compatibility:Most 24mm flanges for electric double and manual pumps
- Cleaning Method:Dishwasher safe, included cleaning brush
- Included Accessories:10 inserts (2 per size), nipple measurement ruler, cleaning brush
- Replacement Interval:Every 2 months
- Additional Feature:Includes cleaning brush
- Additional Feature:Free nipple measurement ruler
- Additional Feature:Replace every two months
Nenesupply 19mm Oval Flanges for Medela Pumps
Nenesupply’s 19mm oval flanges are the most comfortable choice for pumping moms with smaller nipples. You’ll love how the soft, flexible rims conform naturally to your breast shape, preventing any skin rubbing. The oval design lets you rotate 360 degrees for the perfect angle, and the wider 105 degree angle creates a pressure-free seal, bringing your nipple closer to the tunnel for better suction. They’re compatible with Medela Pump in Style, Symphony, and more, plus they work with most hands-free bras. Cleanup’s a breeze since they’re dishwasher safe. And don’t worry, they’re BPA and DEHP free.
- Size Options:19mm (available 17mm, 19mm, 21mm)
- Material:BPA and DEHP-free material
- Compatibility:Medela Pump in Style, Symphony, Swing Maxi, Harmony, Personalfit Flex
- Cleaning Method:Dishwasher safe
- Included Accessories:2 flanges
- Replacement Interval:Not specified
- Additional Feature:Oval shape, 360-degree rotation
- Additional Feature:105-degree wider angle
- Additional Feature:Works with hands-free bras
Factors to Consider When Choosing a Flange for Breast Pump
Before you pick a flange, you need to nail down your exact nipple size with a measurement guide. You’ll also want to check the material’s safety standards for your skin and verify it’s compatible with your pump model. Finally, consider the comfort and fit features along with how easy it’s to clean and maintain.
Size Measurement Guide
Getting the right flange size starts with one simple step: accurately measuring your nipple. You’ll want to measure both before and after pumping, since your size can change during a session. Grab a nipple measuring ruler, which gives precise diameter readings. Typically, ideal flange sizes range from 13mm to 21mm, but don’t assume your size falls there. Measure carefully and note the number.
A proper measurement prevents nipple soreness and ensures efficient milk expression, so you’re not fighting a poor fit. And here’s a pro tip: your nipple size can vary throughout breastfeeding, so re-measure every few weeks. If you’re between sizes, choose a flange insert that matches your measured diameter. That’s your ticket to a secure seal and comfortable flow.
Material Safety Standards
When you’re choosing a flange, material safety standards should be your top priority. You need flanges made from BPA-free, food-grade silicone or plastics. These materials are safe for direct skin contact and milk expression, plus they meet FDA regulations to prevent harmful chemical leaching. Look for options that are dishwasher safe or compatible with steam sterilization. This keeps hygiene high without compromising the material’s integrity over time. And don’t ignore hypoallergenic, non-toxic components. They reduce risks of skin irritation or allergies during pumping sessions. Medical-grade, tested materials offer you long term durability and peace of mind. They’re free from harmful substances, so you can focus on comfort and efficiency. Remember, safe materials mean safer milk. No shortcuts here.
Pump Compatibility Check
So you’ve locked in those material safety standards, and now it’s time to make certain your chosen flange actually works with your pump. Start by checking the size compatibility. Different pump models demand specific flange dimensions, so measure your nipple diameter and tunnel size precisely. Then, verify it’s designed for your pump type, whether electric or manual. The connection system matters too; match the flange’s interface to your pump’s to avoid frustration. And don’t skip the safety check guarantee any replacement or custom flange is FDA approved and BPA free. For step by step guidance:
- Measure nipple diameter with a ruler or printable gauge.
- Compare to your pump’s required tunnel size.
- Confirm the flange fits your pump’s specific connection type.
You’ve got this! A precise fit prevents leaks and boosts efficiency.
Comfort & Fit Features
First, focus on a flange that prioritizes comfort and fit. A properly fitting flange reduces nipple and breast discomfort during pumping, enhancing overall comfort. Measure your nipple diameter both before and after pumping to nail the ideal size. And don’t overlook the material: soft, flexible silicone cushions help the flange conform to your breast shape, increasing comfort considerably.
- Proper fit creates a better seal, preventing air leaks and improving suction efficiency.
- Ill-fitting flanges cause rubbing, squeezing, and pain, which shortens your pumping sessions and lowers milk output.
Choose a flange that feels like a natural extension of your body. When it fits right, you’ll pump longer and more comfortably. That’s the goal: a match made in pumping heaven.
Cleaning & Maintenance Needs
Once you’ve found a flange that fits like a dream, you’ll want to keep it performing that way. Choose materials that are dishwasher safe and can handle steam sterilization; that makes sanitation a breeze. You’ll also need to regularly clean inserts and valves with mild soap and water to prevent bacterial growth. Ease of disassembly matters too. If parts snap apart quickly, you’re more likely to clean them thoroughly.
- Replace flange inserts and valves every two months to maintain ideal suction and avoid residue buildup.
- Use a sponge brush to reach those tricky spots and keep your pump running smoothly.
And don’t forget, a little maintenance goes a long way toward consistent performance.
Adjustable Size Options
One key factor that can make or break your pumping comfort and efficiency is whether the flange offers adjustable size options. Your nipples can change size over time, so a one-size-fits-all approach just doesn’t cut it. Flanges with multiple inserts or adjustable features let you customize the fit as needed. This isn’t just about comfort, it’s about output too. A proper fit reduces nipple soreness and supports better milk flow, minimizing your risk of clogged ducts or decreased supply. Look for flanges that let you easily switch sizes without buying a whole new piece. That way, you’re not stuck with an uncomfortable pump that fights your body. Instead, you get a glove-like fit that works with you, every session.
Longevity & Durability
Because you’re likely cleaning and using your flanges several times a day, the materials they’re made from directly impact how long they’ll last. Durable options, like BPA-free silicone or high-quality plastics, handle repeated sterilization without cracking or warping. Reinforced rims and thick walls are worth seeking out. They resist wear and tear, so your flange won’t lose its shape or start leaking.
But longevity isn’t just about the material. Proper maintenance matters too. Clean your flanges after every use, and inspect them regularly for signs of degradation, like cloudiness or tiny cracks. If you spot any damage, swap them out immediately. A worn flange can reduce pumping efficiency and even irritate your skin. Replace your set every three to six months, or sooner if you notice changes. That consistency keeps your pump working smoothly and your sessions comfortable.
Cost & Value Balance
Now, the same factors that keep your flanges lasting longer also play into how much value you’re really getting for your money. You might eye a cheaper set, but consider this: a lower price often buys discomfort or poor fit, which can tank your milk output and lead to nipple pain. That’s a hidden cost in frustration and lost time.
Instead, focus on what you’re paying for. A higher priced flange typically offers better material quality, like soft silicone, and precise sizing. That means fewer replacements and more efficient pumping sessions.
Here’s a quick breakdown:
- Cheaper options save upfront but may cost you in comfort and effectiveness.
- Investing in the right size from the start boosts milk flow and reduces wear.
