Choosing the right size for your menstrual cup! Two features recommended for first-time users

What sizes of menstrual cups are available?
I don't know what cup size is right for me.
When choosing a menstrual cup, some people may be faced with the same dilemma as the various sizes available. Especially when using a menstrual cup for the first time, the sheer number of options can be overwhelming.
In this article, Murmo will clearly explain the criteria for choosing the size of a menstrual cup and the features recommended for beginners, using their unique knowledge.
If you're interested in menstrual cups but aren't sure which size to choose, be sure to check this out.
Size may not be the first priority when it comes to first-time menstrual cups | Murmo survey results
When choosing a menstrual cup for the first time, many people tend to focus on the "right size for them," but that may not actually be their top priority.
This is because, as a result of monitor surveys conducted during the development stage of Murmo, we concluded that it is difficult to find the perfect cup for you based solely on the traditional criteria for choosing a size, such as the amount of bleeding or whether or not you have given birth.
Below is a summary of traditional size selection criteria and Murmo's original research into them.
| General size selection criteria | Murmo investigation |
|---|---|
| Larger sizes are better for multiparous women | Even women who have given birth may not be able to wear larger sizes. |
| If you have a heavy menstrual flow, a larger size is better. | It may be difficult to put on and take off due to its large size |
| If you have strong pelvic floor muscles, a thinner type is better. | It's difficult to judge the strength of your pelvic floor muscles yourself |
| If you have a low uterus, a smaller size is better. |
|
As you can see, it can be difficult to find the right size for you using standard size selection methods .
Based on these findings, Murmo decided that a "slim and long" shape would be ideal for those using a menstrual cup for the first time, and so proceeded with development.
For your first menstrual cup, we recommend a slim and long one rather than a large one.
Murmo's original research has revealed that when choosing your first menstrual cup, you should pay more attention to its slim and long "shape" rather than its size.
We will explain the reasons for each.
1. Why being slim is good

Here are some reasons why a slim menstrual cup is a good choice:
| The benefits of being slim | reason |
|---|---|
| The cup easily spreads inside the vagina | Because the caliber is small, there is less physical repulsion when it expands in the vagina. |
| Easy to insert | Easy to insert as it keeps its folded shape |
| Less snagging when removing | Because the opening is small, there is less chance of snagging when removing the contents compared to larger or harder sizes. |
| Less discomfort while wearing | The slim shape fits easily inside the vagina |
The advantage of slim menstrual cups is that they overcome the challenges that first-time users often encounter when using a menstrual cup, such as having to keep the cup folded when inserting it, opening the cup inside the vagina after inserting it, and having difficulty removing it when it is open.
2. Why longer is better

The main benefits of a menstrual cup with a larger diameter include:
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It can capture the amount of menstrual blood
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The stem is easy to find
Even though it has a slim design, the menstrual cup is long enough to ensure a sufficient capacity.
One of the benefits is that compared to regular sanitary products, you can store a larger amount constantly, so you can change them less frequently and it's less of a hassle .
In addition, the length of the stem makes it easier to reach the entrance of the vagina, making it much easier to remove .
This will also help alleviate the anxiety that first-time users of menstrual cups often have about not being able to remove it properly.
At Murmo , we use a long teardrop-shaped stem that makes it easy to remove the menstrual cup, so that even first-time users can use it with confidence .

The shape remains the same no matter where you grab it, so you can easily remove it without worrying about the direction of the stem.
If it's your first time using one, you might think that a ring type would be best, but most rings have a wide, hard shape at the bottom of the cup, which can cause discomfort when the stem touches the entrance to the vagina. Also, you need to check the orientation of the hole in the ring before hooking your finger through it, so murmo does not use a ring, but instead makes it long and teardrop-shaped.
Longer menstrual cups are a great option for beginners as they can more easily accommodate your flow and are easier to remove.
If you're having trouble choosing your first menstrual cup, why not start by considering the Murmo menstrual cup?
Once you get used to using a menstrual cup, it's a good idea to have different sizes.
As you become more accustomed to using a menstrual cup, you will gradually learn how to use it in a way that suits your menstrual flow and lifestyle.
If you have a heavy period, you may find yourself wishing you had a cup with a larger capacity on your heavy flow days.
In such cases, it may be a good idea to have another menstrual cup in a larger size for heavy periods. If you are used to using it, you will likely be able to make the transition smoothly without any discomfort.
In addition, using it in combination with a sanitary napkin is also effective as a leak prevention measure, so if you are unsure whether to go up a size, it may be a good idea to try it.
However, if your cup fills up quickly each time you have your period, it could be that your flow is too heavy.
It is also possible that you have menstrual bleeding, so if you have a tendency towards this, we recommend that you visit a gynecologist before changing your size.
Frequently asked questions about menstrual cup sizes
When using a menstrual cup, there may be times when you feel anxious and wonder, "Is the size not right?"
We'll answer some common questions about sizes to help you choose the right menstrual cup.
If my menstrual cup leaks on the second day, does that mean it's the wrong size?
The reasons why menstrual cups leak are thought to be due to "not being placed correctly" or "heavy menstrual flow" rather than size .
For example, if the cup is not inserted properly, it will not fit tightly into the vagina, which could cause menstrual blood to leak between the vaginal wall and the cup.
Generally, menstrual flow tends to be heavier around the second day.
Especially on the second day, when menstrual flow tends to be heavier, some women find that their cup fills up within 12 hours and starts leaking.
In that case, please change it according to the amount of menstrual blood.
If you notice excessive menstrual bleeding, consider consulting a gynecologist.
If I feel my menstrual cup moving when I poop, does that mean it's the wrong size?
If you feel your menstrual cup moving around during a bowel movement, it may have more to do with your anatomy than its size .
In the human body, the vagina and the anus, through which feces pass, are located next to each other. [1]
As a result, the movement of the stool can be transmitted to the menstrual cup, and you may feel as if the menstrual cup is being pushed when you strain to poop.
Some people feel this discomfort especially strongly when they are constipated.
If you experience discomfort and are unable to poop properly or if the cup comes out, remove the menstrual cup before defecation.
summary
When choosing the size of a menstrual cup, one approach is to use factors such as childbirth experience, menstrual flow, strength of pelvic floor muscles, and position of the uterus as guidelines.
However, these vary greatly from person to person, making it difficult to judge in practice.
Based on these real-life voices and survey results from the field, murmo has developed a menstrual cup with a slim and long design that is easy to use even for beginners.
It fits any body type and lifestyle, and the one-size-fits-all design makes it easy for beginners to choose.
If you're interested in menstrual cups but are unsure about which size to choose, why not start with a Murmo menstrual cup?
We support you in taking the first step to choose without hesitation and use with confidence.



