Every mom deserves comfort and confidence on her pumping journey. The Flange Sizing Kit is a thoughtful 3-in-1 set designed to make breastfeeding easier and more comfortable for both new and experienced moms. It includes 10 silicone flange inserts (13/15/17/19/21mm), a nipple measurement tool for flanges, and a sponge cleaning brush—all the essentials you need in one kit.

Using the correct breast pump flange insert is a true game changer: it helps reduce discomfort, creates a secure seal, and improves suction efficiency—supporting better milk flow and a more relaxed pumping experience. Our soft, food-grade silicone flanges provide a cushioned fit that is gentle on sensitive skin, making them an essential part of your breastfeeding essentials and breast feeding essentials.

The included nipple ruler (sizer) makes measuring simple, ensuring moms find their ideal size without guesswork. With five sizes of flange inserts in one kit, you can easily customize your fit for each side—no need to purchase multiple single sizes.

Built for real life, this nipple flange sizing kit is compatible with most standard 24mm shield. Easy to install, use, and clean with the included sponge brush, it’s designed for busy moms who need reliable support at home or on the go.

Whether you are just starting your pumping journey or already experienced, this flange size kit provides the comfort, safety, and confidence every mom deserves.
Increase Milk Output by 30%: The Flange Sizing Kit, developed by an IBCLC, eliminates confusion, ensures a perfect fit, and boosts milk flow by 30%. Experience a smoother, more efficient journey — perfect for new or expecting moms seeking comfort and confidence
Highly Compatible: 10PCS silicone flange inserts come in a variety of sizes to choose from 13/15/17/19/21mm (2 flange inserts of each size) Fits with 24mm flanges/shields. Note: Not compatible with 27-28mm shields
Getting The Right Flange Size: Our IBCLC-approved nipple ruler tool eliminates guesswork. Track nipple size changes across breastfeeding stages and pair with matching flange insert for optimal suction comfort and complete milk drainage
Safe for Mom and Baby：Made from food-grade silicone, these BPA-free flange inserts provide a soft, snug fit for a comfortable and efficient pumping experience. For optimal performance and maximum milk output, we recommend replacing the flange inserts every 1-2 months
Enhanced Pumping Efficiency : This flange sizing kit helps improve milk output by offering the right fit for your nipple size. Our silicone flange inserts are designed to increase comfort while stimulating milk flow, resulting in more efficient pumping and better milk production