Flange Fittings

Why Does it Matter?

Between the tubes and wires, mechanics and logistics, the whole pumping process can feel overwhelming. But one thing can make it considerably easier: double-checking that you're using the right breast pump flange size. A breast pump flange, also known as a breast shield, is the plastic piece that fits directly over your nipple to form a seal around the areola. This creates a vacuum seal that gently draws your nipple into the flange tunnel for milk extraction. However, having the wrong size flange can impact milk supply and lead to soreness or clogged milk ducts. Having correct contact with the nipple and breast tissue is incredibly important for adequate suction and milk production. 

For first-time pumpers, seeing a lactation specialist can be helpful in determining the correct flange size for your nipple size as well as areola density and fullness, and can make a big difference in your pumping experience. Having the correct flange size can make the difference between a frustrating struggle to express enough milk and a situation where you can more easily (and painlessly) pump for your baby’s needs.

Using the COMFY Model:

  • Center nipples. Your nipple should move freely in and out without touching the sides of the flange and without redness or pain. 

  • Only a little areola tissue should be pulled into the tunnel. You should see a bit of areola pulling into the tunnel with each pump cycle, but not too much or none at all. 

  • Motion of your breast is gentle and rhythmic. Your breasts should move back and forth every time the pump moves, but gently.

  • Feels comfortable breast pumping. Your breast pump shouldn't cause any pain and tenderness. 

  • Yields well-drained breasts. Your pump needs to remove the majority of your milk from your breasts to keep up your milk production. Your breasts should feel noticeably softer and lighter once you’re done with your session much like after nursing baby.

Some signs that your flanges don't fit quite right include:

  • Your breasts are moving too much or too little while pumping.

  • Your nipple is rubbing the sides of the tunnel which causes discomfort.

  • Your nipples are red or white after pumping.

  • Your breasts still feel full after pumping.

Total Family Wellness .