Maymom Flange Inserts Review: Sizes and Fit

Maymom Flange Inserts, 19 mm, for 24 mm Shields (2 pack)

Photos coming soon.

The short version

Buy it if

Pumping parents with 24 mm flanges who measure smaller than 24 mm
Anyone testing a new size before buying full flanges
Wearable pump users with compatible 24 mm cups

Skip it if

Your pump has low suction and you can buy a smaller hard flange instead
Your flanges are not 24 mm
You want every size in one box

What owners like

An inexpensive way to test a smaller size before buying new flanges
Wide compatibility with common 24 mm pump parts
Many size options in small steps

Common complaints

Can dull suction on some pumps, especially lower suction models
May not sit flush in flanges smaller than 25 mm because of the flange angle
Single size packs mean buying more than one if you are unsure of your size

Based on The Amazon product listing, Maymom's breastshield selection guide, two Lactation Hub product pages, a Genuine Lactation sizing guide and a Nurturing Expressions product page..

Research scores

Does the job 6.8 narrows a 24 mm tunnel cheaply, but may dull suction or not sit flush

Safety info and materials 6.0 silicone and boiling water sterilizing stated, little else from the maker

Ease of use 7.0 drops into common 24 mm flanges with a clear sizing guide

Value 7.5 low cost way to test a size before buying flanges

Scored from the maker's specs and what owners report. Drew's own notes and photos will refine these.

Ownership

Times bought1

Price range$

Drew's hands-on notes for this product are on the way. Long-term updates will be added to this timeline.

What it does

Soft silicone inserts that sit inside a 24 mm breast pump flange to narrow the tunnel, sold by size from 13 to 21 mm; reviewed here in place of the BAUME 10 piece mixed size insert set.

Lets you try a smaller tunnel size without buying new flanges
Works with many common 24 mm flanges and wearable cups
Silicone that can be sterilized in boiling water
Sold in many single sizes, and some lactation shops sell a mix and match option
Lactation Hub describes them as a sizing tool lactation consultants use

A low cost way for pumping parents to try a smaller tunnel size on flanges they already own, from the best known maker of inserts. The trade-offs are that each pack is a single size rather than a mixed set, inserts may not sit flush in every flange, and a lactation site notes they can dull suction on some pumps, where a smaller hard flange may suit better.

How it compares

Maymom MyFit flanges in a smaller sizeBetter if inserts weaken suction on your pump, since a hard flange keeps the original shape$

Maymom SHORT silicone flange insertsBetter for some wearable cups and Elvie style flanges where a shorter insert is needed$

Medela PersonalFit Flex breast shieldsBetter if you use a Medela pump and want a maker part in your size$$

Specs

Size: Reduces a 24 mm tunnel to 19 mm (13, 15, 17 and 21 mm also sold)
Count: 2 inserts per pack
Material: Silicone, can be sterilized in boiling water
Fits: Medela 24 mm shields (Freestyle, Harmony), Spectra 24 mm flanges, Momcozy and Willow 24 mm cups, per the listing
Versions: Standard and shorter versions; the short one fits only select 24 mm flanges

Worth knowing

Maymom says the short insert is compatible only with select 24 mm flanges.
Maymom's sizing guide suggests seeing an International Board Certified Lactation Consultant if fit problems continue.

Questions

Do Maymom inserts fit Spectra flanges?

Yes. Maymom lists them for Spectra 24 mm flanges as well as Medela 24 mm shields.

What size flange insert do I need?

Maymom's guide says the tunnel should be 1 to 2 mm wider than the nipple measured after pumping, and suggests an IBCLC if problems persist.

Can you sterilize Maymom flange inserts?

Lactation Hub says the silicone is heat resistant and can be sterilized in boiling water.

How many inserts come in a pack?

Two inserts of one size per pack.

Sources

Researched 2026-10-02. We bought this product; our page is built from the maker's details and what owners report across reviews and forums. We never copy Amazon customer reviews.