by Ashton Fortin Higgins, PhD, MEd, certifying cALS, Nipple size changes during breastfeeding, pumping and lactation. Several evidence based studies have indicated that the average nipple size is actually smaller than the standard size flanges that come with breast pumps.
Breast Pump Flanges, Getting the Right Size
Helpful Breast Shield Sizing Guide
Flange sizing simplified — Every Drop Lactation Services
Pumping. Part Three. Using Your Breast Pump.
Do you know your flange size? Does pumping hurt? Is your areola pulled, measuring for pumping
Finding The Correct Breast Pump Flange Size
KOLEKY Nipple Ruler - Accurate and Soft Flange Sizing Measurement Tool for Breast Pump and Nipple Shield - Essential for New Moms and Breastfeeding - 6 Color Options(Purple) : Baby
SimpliFed Blog - Fitting Your Breast Shields
When it Comes to Pumping Flanges… Size Matters!