Our definition of ultrasmall is based on hundreds of menstrual cups and their measurements.
The limit we set for a menstrual cup to be qualified as an ultrasmall cup is < 45 mm in body length.
You should consider an ultrasmall menstrual cup if:
You have a low cervix (short vaginal canal).
How Do I Know If I Have a Low Cervix?
What Is a Cervix?
The cervix is essentially the connection between the vagina and the uterus.
And a low cervix is a term used to describe a cervix that is felt low in the vagina.
To determine the height of your cervix I recommend checking the section Low, Medium, or High Cervix: Determining the Height of Your Cervix in our article Menstrual Cups for a Low Cervix: A Complete Guide.
The article is packed with educational images and nice-looking illustrations.
Go check them out — I think you'll like them!
Once you’ve measured your cervix and are sure you have a low cervix come back to this post and familiarize yourself with the ultrasmall cups in the following section.
Ultrasmall Menstrual Cups
As I mentioned at the beginning of this article an ultrasmall menstrual cup is by our definition a cup that is < 45 mm in body length.
Me Luna Shorty
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| Me Luna Shorty S | 38 mm | 35 mm | 12 mm | 47 mm | 15 ml | Germany | Germany |
| Me Luna Shorty M | 41 mm | 38 mm | 13 mm | 51 mm | 18 ml | Germany | Germany |
| Me Luna Shorty L | 44 mm | 41 mm | 14 mm | 55 mm | 22 ml | Germany | Germany |
| Me Luna Shorty XL | 47 mm | 44 mm | 15 mm | 59 mm | 27 ml | Germany | Germany |
Me Luna Shorty cups have a slightly different shape than the standard Me Luna.
They are slightly shorter and run tapered to a point.
The Me Luna Shorty pop opens more strongly and seals more firmly than other models.
This is due to the shorter cone shape.
Breaking the seal and removing the cup could, therefore, require more practice.
One reason I like Me Luna so much is that you can design your own cup!
You can choose firmness, standard or shorty, handle style, and size.
The Me Luna Shorty is offered in four sizes:
Small, Medium, Large, and Extra Large.
You can choose between three firmness levels:
Soft, Classic, and Sport.
Soft being the softest, Classic is medium soft and Sport is the firmest.
And you can choose between three handle styles:
Stem, ring, and ball.
How cool is that?
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JuJu Model 4
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| JuJu Model 4 | 48 mm | 40 mm | 10 mm | 50 mm | 32 ml | Australia | Australia |
The JuJu Model 4 has a shorter body and stem and is more bulbous in shape compared to the other JuJu Models.
It’s the widest of the four models measuring 48 mm in diameter.
JuJu cups are available in two finishes:
Smooth and “grippy”.
“Grippy” is a newer finish.
The newer finish has a more pronounced grip pattern in a matte finish on the base of the cup.
The newer finish also has a thicker stem.
The JuJu Model 4 is only available in the newer “grippy” finish.
Bear in mind that a more pronounced grip pattern makes removal easier but may irritate the delicate tissue in the vagina whilst a smoother finish is more comfortable and easier to clean but more difficult to remove.
Formoonsa Cup
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| Formoonsa Training Cup | 36 mm | 31 mm | 24 mm | 55 mm | 10 ml | Taiwan | Taiwan |
| Formoonsa Standard Cup | 44 mm | 37 mm | 17 mm | 54 mm | 20 ml | Taiwan | Taiwan |
| Formoonsa Large Cup | 48 mm | 44 mm | 8 mm | 52 mm | 30 ml | Taiwan | Taiwan |
The Formoonsa Cup is a Taiwanese brand.
The cups are manufactured in Taiwan.
The Formoonsa menstrual cup was launched in February 2017 and is the first-ever menstrual cup brand from Taiwan.
Regarding features.
The Formoonsa cup has a spill-proof design.
The top part of the cup folds inward to prevent blood from spilling upon removal.
The rim is designed with a special area for an easier c-fold.
Training, Standard, and Large models do not have any air holes compared to the Classic and Soft.
FemmyCycle
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| FemmyCycle Petite | 31 mm | 38 mm | 15 mm | 57 mm | 17.5 ml | USA | USA |
| FemmyCycle Regular | 36 mm | 43 mm | 7 mm | 50 mm | 30 ml | USA | USA |
| FemmyCycle Low Cervix | 36 mm | 43 mm | 20 mm | 63 mm | 30 ml | USA | USA |
The FemmyCycle features a no-spill foldable rim design.
The spill-proof design helps you not to spill/splash as you pour out your menstrual flow from it.
When the FemmyCycle is in catching blood mode menstrual flow is funneled in thanks to the folded lid.
Another unique design feature that might seem a little bit strange, but that FemmyCycle says is nothing to worry about, is that the cup doesn’t need to open completely once inserted.
Opening up as much as it needs to is enough.
The FemmyCycle cup will still function properly and catch the blood.
There have been slight modifications to the design of the FemmyCycle over the years.
Today’s models are softer and the pull-ring is less bulky.
Also, unlike other menstrual cups, FemmyCycle cups do not have any air holes at the rim.
The FemmyCycle is available in three sizes:
Petite, Regular, and Low Cervix.
Merula Cup One-Size
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| Merula Cup One-Size | 46 mm | 39 mm | 33 mm | 72 mm | 38 ml | Germany | Germany |
The Merula menstrual cup is made of medical-grade silicone.
It is produced in Germany and was introduced to the market at the beginning of 2017.
One unique feature of the Merula is that the cup doesn’t need to completely unfold.
Similar to the FemmyCycle.
The bottom of the cup can stay collapsed.
Merula cups do not have any air holes.
And it does not have any grippers at the base of the cup.
This can make removing the cup more difficult.
Merula cups have a long, ladder-shaped stem that you can easily trim with a pair of scissors.
Be sure to wash the scissors and cup before and after!
OrganiCup Mini
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| OrganiCup Mini | 37 mm | 44 mm | 14 mm | 58 mm | 17 ml | Denmark | China |
OrganiCup was born in Copenhagen, Denmark in 2012.
Size A and size B have been around for a while but size Mini was launched in 2019.
OrganiCup is made of medical-grade silicone.
The medical-grade silicone is made in the US and the cup is produced in China.
The OrganiCup Mini is intended for teens or those who need a smaller sized cup.
MermaidCup Guppy
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| MermaidCup Guppy Classic Soft Size 1 | 45 mm | 40 mm | 24 mm | 64 mm | 24 ml | Malaysia | China |
| MermaidCup Guppy Classic Soft Size 2 | 48 mm | 40 mm | 24 mm | 64 mm | 28 ml | Malaysia | China |
| MermaidCup Guppy Firm Size 1 | 45 mm | 40 mm | 24 mm | 64 mm | 24 ml | Malaysia | China |
| MermaidCup Guppy Firm Size 2 | 48 mm | 40 mm | 24 mm | 64 mm | 28 ml | Malaysia | China |
The MermaidCup Guppy is designed in Malaysia and manufactured in China.
It is made of Japanese medical-grade silicone.
The Guppy model is considered a low cervix cup and comes in four models:
Classic Soft Size 1, Classic Soft Size 2, Firm Size 1, and Firm Size 2.
The MermaidCup Guppy comes equipped with grippers at the base of the cup, measuring markings, air holes, and an adjustable stem.
SckoonCup Size 1
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| SckoonCup Size 1 | 40 mm | 40 mm | 30 mm | 70 mm | 23 ml | USA | USA |
The SckoonCup is produced in the USA and was introduced to the market in 2013.
It’s made of medical-grade silicone and the cup is both FDA registered and FDA cleared.
FDA 510(k) clearance is a further assurance that a cup brand is of good quality and in compliance with the FDA requirements for medical devices.
So if you’re really wary about what sort of feminine hygiene products you use, I recommend considering a menstrual cup that is FDA cleared.
Here’ a list of all FDA cleared cups in the USA.
Regarding features.
The SckoonCup has grip patterns, air holes, and compared to other menstrual cups it is molded in one single piece.
The result of this process is a cup without any seams that can irritate the delicate tissue in the vagina.
The SckoonCup comes in two sizes:
Size 1 (Small) and Size 2 (Large).
Size 1 is the shorter of the two and is recommended for a low cervix.
bfree Cup Zero
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| bfree Cup Zero | 38 mm | N/A | N/A | 44 mm | 10 ml | Canada | Canada |
The bfree Cup is a Canadian brand.
It was launched in 2018 and is the world's first antibacterial menstrual cup.
The term antibacterial means it doesn’t need water and it doesn’t need to be boiled.
You can just wipe it clean.
How it works:
What this technology essentially does is it prevents the attachment of bacteria onto the medical-grade silicone.
This innovative design is not found in any other menstrual cup.
Other features include tactile finger grips and a spherical-shaped stem (not supposed to be trimmed).
Note that this cup lacks air holes.
The bfree Cup comes in 4 different sizes and the bfree Cup Zero which is the smallest of the four can hold up to 10 ml of menstrual flow.
Tampax Cup Regular
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| Tampax Cup Regular | 48 mm | 42 mm | N/A | N/A | 25 ml | USA | USA |
The Tampax Cup is made in the USA.
Its main feature is its so-called SoftCurve shape (V-shape) which means the cup is not as rounded at the bottom as other menstrual cups and therefore puts less pressure on your bladder.
The Tampax Cup is made of medical-grade silicone and comes in two sizes:
Mïu
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| Mïu Cup Soft Small | 41 mm | 44 mm | 16 mm | 60 mm | 18 ml | France | France |
| Mïu Cup Firm Small | 41 mm | 44 mm | 16 mm | 60 mm | 18 ml | France | France |
The Mïu Cup (the link goes to Mïu's homepage that is in French) is made of medical-grade silicone and is produced in France.
It comes in two sizes:
Small and Large.
And two firmness levels:
Soft and Firm.
Ultrasmall menstrual cups comparison chart
| Menstrual Cup | Diameter | Body Length | Stem Length | Total Length | Capacity | Country Brand | Country Manufacturer |
|---|---|---|---|---|---|---|---|
| Formoonsa Training Cup | 36 mm | 31 mm | 24 mm | 55 mm | 10 ml | Taiwan | Taiwan |
| Me Luna Shorty S | 38 mm | 35 mm | 12 mm | 47 mm | 15 ml | Germany | Germany |
| Formoonsa Standard Cup | 44 mm | 37 mm | 17 mm | 54 mm | 20 ml | Taiwan | Taiwan |
| FemmyCycle Petite | 31 mm | 38 mm | 15 mm | 57 mm | 17.5 ml | USA | USA |
| Me Luna Shorty M | 41 mm | 38 mm | 13 mm | 51 mm | 18 ml | Germany | Germany |
| Merula Cup One-Size | 46 mm | 39 mm | 33 mm | 72 mm | 38 ml | Germany | Germany |
| JuJu Model 4 | 48 mm | 40 mm | 10 mm | 50 mm | 32 ml | Australia | Australia |
| MermaidCup Guppy Classic Soft Size 1 | 45 mm | 40 mm | 24 mm | 64 mm | 24 ml | Malaysia | China |
| MermaidCup Guppy Classic Soft Size 2 | 48 mm | 40 mm | 24 mm | 64 mm | 28 ml | Malaysia | China |
| MermaidCup Guppy Firm Size 1 | 45 mm | 40 mm | 24 mm | 64 mm | 24 ml | Malaysia | China |
| MermaidCup Guppy Firm Size 2 | 48 mm | 40 mm | 24 mm | 64 mm | 28 ml | Malaysia | China |
| SckoonCup Size 1 | 40 mm | 40 mm | 30 mm | 70 mm | 23 ml | USA | USA |
| Me Luna Shorty L | 44 mm | 41 mm | 14 mm | 55 mm | 22 ml | Germany | Germany |
| Tampax Cup Regular | 48 mm | 42 mm | N/A | N/A | 25 ml | USA | USA |
| FemmyCycle Low Cervix | 36 mm | 43 mm | 20 mm | 63 mm | 30 ml | USA | USA |
| FemmyCycle Regular | 36 mm | 43 mm | 7 mm | 50 mm | 30 ml | USA | USA |
| Formoonsa Large Cup | 48 mm | 44 mm | 8 mm | 52 mm | 30 ml | Taiwan | Taiwan |
| Me Luna Shorty XL | 47 mm | 44 mm | 15 mm | 59 mm | 27 ml | Germany | Germany |
| Mïu Cup Soft Small | 41 mm | 44 mm | 16 mm | 60 mm | 18 ml | France | France |
| Mïu Cup Firm Small | 41 mm | 44 mm | 16 mm | 60 mm | 18 ml | France | France |
| OrganiCup Mini | 37 mm | 44 mm | 14 mm | 58 mm | 17 ml | Denmark | China |
| bfree Cup Zero | 38 mm | N/A | N/A | 44 mm | 10 ml | Canada | Canada |
CUP-FIGURATOR™ — the Ultimate Menstrual Cup Finder to the Rescue
Are you also overwhelmed by the millions of different menstrual cup options that we've listed in this post?
So am I!
It's difficult to know where to start.
Specially if it's the first time you're out on a quest for a menstrual cup.
But here's the good news:
Our very own sophisticated menstrual cup finder tool.
If you haven't tried it already, give it a go, and let it do all the heavy lifting for you.
I think you'll be pleasantly surprised.
Sources
https://www.me-luna.eu/
https://www.juju.com.au/
https://www.formoonsacup.com/
https://femmycycle.com/
https://www.merula-cup.de/en/
https://www.organicup.com/
https://cottonmermaid.com/
https://www.sckoon.com/
https://bfreecup.com/
https://tampaxcup.com/
https://tampax.com/en-us
https://miu-cup.com/
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