How do I find out my flange size?Updated 7 days ago

To determine your flange size you will need to measure your nipple. Use a nipple ruler or other measuring tool to find the diameter of your nipple (the horizontal width across it) in millimeters (1 cm = 10mm). Measure the nipple alone and do not include the areola, which is the area just outside your nipple. Add 0-3 mm to this measurement to find your flange size. The correct flange size should allow only the nipple to enter the flange tunnel, be comfortable, and result in your breasts feeling well-drained after a pumping session.

Make sure to measure both nipples. You may need two different sizes!  

Quick Tip

No ruler? You can use these common household items to measure: AAA Battery = 11mm, AA Battery = 15mm, Dime = 18mm, Penny = 20mm, Nickel = 22mm, and a Quarter is 24mm.