ComfortFit® Breast Pump Flange Inserts

• Designed for Your Comfort– ComfortFit Breast Pump Flange Inserts have deep cups with soft, flexible rims to gently hug your curves and create a comfortable, secure seal on your Lansinoh breast pump
• Three Sizes for a Better Fit – Available in 17 mm, 19 mm, and 21 mm, use a breast pump flange sizing kit to find the best fit for you
• Compatible with Lansinoh Breastfeeding Pumps – Replacement flanges for Lansinoh NaturalWave Breast Pump, Signature Pro Breast Pump, Signature Comfort Breast Pump, Manual Pump, and Extra Pumping Set
• Made with Soft, 100% Silicone – Made without BPA and BPS, silicone flange inserts are safe to use as part of your daily pump‑store‑feed routine
• Easy to Clean Between Pumping Sessions – Flange inserts can be washed with warm, soapy water or placed in the dishwasher between uses, making it easier for you to maintain your breast pump

Use a nipple ruler, sizing tool, or soft tape measure to measure the nipple tip diameter, not your areola, at rest (before pumping). This measurement is your starting point.
If your nipple is flat or inverted, you can use a nipple everter tool to take more accurate measurements with a ruler. Next, Choose the flange or flange inserts that correspond to your nipple measurement. Your nipple should fit comfortably in the center of the flange tunnel, with little to no areola pulled into it.
Both sides of your nipple should gently touch the walls of the tunnel with no air gaps on either side. However, if there is a lot of space around your nipple, and your areola is being pulled in, you will want to size down.
Nipple size and shape can change over time or even during a single pumping session. Each breast may also require a different size. Make sure to check in with your body and notice how you feel each time you pump.