04/13/2026
Finding the right fl**ge fit is honestly half the battle when it comes to pumping. Most of the "standard" advice out there is actually outdated, so we’re going to use the Babies in Common Fl**ge FITS method. It’s a total game-changer. (See the guide and study: https://www.babiesincommon.com/fl**ge-fits-guide)
Here is the breakdown of how to get your fit right without the trial-and-error headache.
Step 1: Measuring (The Right Way)
Forget what you’ve heard about measuring the base of the ni**le. We only care about the tip of the ni**le.
- Measure both: Make sure to measure each ni**le individually. They can be slightly different sizes, and you might actually need a different fl**ge size for the left versus the right.
- The Rule: Measure the diameter of the very tip.
- The Fit: Start with a fl**ge that is exactly that size, not larger.
- The Goal: You want the ni**le to fill the tunnel without being wedged in. It should move freely back and forth. Only the ni**le should be in the tunnel - no ar**la - and your breast tissue should fill the cup of the fl**ge.
Step 2: The Five Shapes
There are six shapes/styles on the market. While the "Original" is what everyone knows, it’s VERY rarely the best fit.
1. Original "Classic": Looks like a martini glass. Comes in one-piece or two-pieces (requires a connector). I’ve only ever had about two clients do better with this triangular shape than the others.
2. Comfy: The same as Classic but has a soft plastic rim. https://amzn.to/47U6Yzt
3. Crater: Looks like a shallow bowl. https://amzn.to/4chgxex
4. Pano: Slightly oval with a wider opening (105 degrees). It has a soft pink rim around the outer edge. https://amzn.to/4tJIJMO
5. Saucer: Very flat and only comes in sizes 13, 14, and 15. Great for engorgement or when the breast is very firm and can’t fill the cup. https://amzn.to/3QC0jE0
6. Oval: Other brands make this shape (resembles the Medela Flex). It also has a soft plastic rim like the Pano. https://amzn.to/4c66oRI
*Note: Maymom makes the first five. The "Oval" is made by a few other brands (mostly on Amazon) but size availability varies.
Step 3: Compatibility & Gear
Important:
- Skip the silicone inserts. They usually just cause friction issues. Get a hard plastic fl**ge.
- Make sure you try pumping on each breast to verify the fit on both sides.
- These parts are compatible with Spectra, Motif, Cimilre, and Medela.
- None of these work directly with Baby Buddha, Zomee, or NCVI because their connectors are too wide without an adapter OR Spectra-compatible parts.
Where to buy:
- Maymom: Amazon, lactationhub.com, or bonnieknowsbreast.com
- Ivaronal (includes connector): https://amzn.to/4c66oRI- Baby Buddha/Zomee Kit: Get this kit but toss the fl**ges unless you’re that size https://amzn.to/3QA3ITS. It’s about $10 cheaper than other brands.
Step 4: Testing the Fit
How can you tell if the size/shape is right?
1. Comfort: Your ni**le fills the tunnel comfortably and glides easily. No pinching, no pain.
2. Speed: You should see milk start spraying within a minute (then hit your expression mode button).
3. Output: You will remove more milk with the right fl**ge.
My Recommendation
It really helps to try multiple sizes and shapes. I recommend buying two "Goldie Packs" from Maymom (these include a range of sizes):
- Get a set of Panos with your size in the middle if possible.
- Get a set of Craters with your size in the middle if possible.
- Get a set of connectors.
The best thing to do is work with an IBCLC like myself so you can try everything out in person. (I keep every fl**ge shape and size in stock.) Otherwise, you might end up with something suboptimal!