Complete Momcozy Flange Size Chart Guide
Find Your Perfect Fit for Comfortable and Efficient Pumping
As a fellow mom who’s been through the pumping journey twice, I can’t stress enough how crucial finding the right flange size is for your breastfeeding success. After testing dozens of breast pumps and helping countless mothers through my Breast Pumps Hub community, I’ve learned that 80% of pumping discomfort comes from using the wrong flange size.
The Momcozy flange sizing system is one of the most comprehensive I’ve encountered, offering options from 15mm all the way up to 30mm. In this guide, I’ll walk you through everything you need to know about measuring yourself correctly and choosing the perfect Momcozy flange size for your unique needs.
How to Measure Your Nipple for the Perfect Flange Fit
Getting an accurate measurement is the foundation of comfortable pumping. I always recommend measuring after a pumping session when your nipples are at their largest. For a detailed step-by-step guide, check out my comprehensive tutorial on how to measure your nipple for flange size. Here’s my tried-and-tested method:

My Pro Tips for Accurate Measurement:
Momcozy Flange Size Chart
Your Nipple Measurement | Recommended Momcozy Size | What You Need to Purchase |
---|---|---|
11-13mm | 15mm | 15mm Insert |
13-15mm | 17mm | 17mm Insert |
15-17mm | 19mm | 19mm Insert |
17-20mm | 21mm | 21mm Insert |
21-23mm | 24mm | Included – No Purchase Required |
24-26mm | 27mm | 27mm Flange |
27-29mm | 30mm | Not Available for Purchase |
Understanding Your Results
Based on my extensive testing of Momcozy products, here’s what each category means for your pumping experience:
🟢 Included Size (24mm):
Lucky you! If you measure between 21-23mm, you can use the standard 24mm flange that comes with most Momcozy pumps. This is the most common size, and I’ve found it works beautifully for the majority of moms.
🟡 Insert Required (15mm-21mm):
These smaller sizes require purchasing separate inserts. From my experience, Momcozy inserts are high-quality and create an excellent seal. They’re definitely worth the investment for proper fit and comfort.
🔵 Larger Flange Needed (27mm):
For larger nipples, you’ll need to purchase the 27mm flange separately. I’ve tested this size extensively and found it provides excellent suction and comfort for moms who need the extra room.
🔴 Not Available (30mm):
Unfortunately, Momcozy doesn’t currently offer a 30mm option. If you measure in this range, I’d recommend looking at other brands or consulting with a lactation consultant for alternatives.
Signs You Have the Wrong Flange Size
Through my years of pumping and helping other moms, I’ve learned to recognize these telltale signs of poor flange fit:
Too Small Flange Signs:
Too Large Flange Signs:
Ready to Find Your Perfect Momcozy Flange?
Remember, investing in the right flange size is investing in your comfort and milk supply. Based on my experience reviewing dozens of breast pumps, getting the fit right makes all the difference in your pumping journey.
Happy pumping, mama! You’ve got this. 💕