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Menstrual cup: which size suits me?

The size of the menstrual cup plays an important role in wearing comfort. It depends on your physique, the amount of bleeding, and the condition of your pelvic floor. Manufacturers try to perfectly match these factors in their models – and yet there are extreme differences. So what size should your menstrual cup be? Our guide will help you and answer all the important questions.

The most important things in summary:

  • The menstrual cup needs an optimal fit and must be neither too small nor too large. Only in this way can you be guaranteed a comfortable fit and even with heavier bleeding, everything will remain clean and tight.
  • Various factors influence the size of the menstrual cup. For example, your age, the intensity of your period, and the anatomy in the pelvic area. But also your athleticism and past pregnancies are to be considered.
  • Manufacturers offer different sizes depending on the volume and stem of the menstrual cup.

The right size of the menstrual cup – quickly determined

For the optimal fit of the menstrual cup, manufacturers have brought different sizes on the market, with the same application. Only in this way the model can be perfectly adapted to your body and offers you safe protection during your period. The right size depends on various points, such as your age or your physique.

Therefore, most menstrual cups usually come in two different versions:

Model 1 - Size 1 - SmallModel 1 - Size 1 - Small
The smaller model is suitable for young and athletic women who have not yet given birth. The period here is usually quite weak.The larger model is suitable for middle-aged women who have already given birth vaginally and usually tend to have heavier periods.
Women up to 1,70 m in heightWomen over 1.70 cm tall
Slim statureNormal athletic, less fit
Sport several times a weekSexual activities
VirginsAfter pregnancy
No vaginal deliveryAlready delivered vaginally
Weak menstruationHeavy menstrual bleeding
With this rule of thumb, the selection of most menstrual cups can be narrowed down, and the right model can be purchased quickly. However, there are exceptions to consider here as well. For example, some younger women have a fairly heavy menstrual period and feel comfortable with a larger model. Likewise, there are more mature women who do well with the smaller version and feel it less when wearing it.

The female body is very flexible. The absolutely perfect size of the menstrual cup is unnecessary since it will adapt to the body anyway. But the tendency should be right if you want comfortable wearing and good functionality.

Which size menstrual cup should I use

The exact size depends on these 6 factors

If you don’t want to spend a lot of time thinking about the size of the menstrual cup, choose one of the two models and move on to the practical part. However, then you have no guarantee that the cup will fit your physique and anatomical features. After all, there are many different factors that you should take into account when choosing. Your advantage – a differentiated search will provide you with a well-fitting menstrual cup that you can be satisfied with from the very beginning. Therefore, if necessary, check the following points a little more closely:

  • Position of the cervix

The cervix changes during the period. Its position in relation to the vaginal outlet determines the length of the menstrual cup. It varies between 4.5 cm and 8 cm including the stem. Almost all cups can be easily shortened, even down to 3.5 cm.

  • Strength of your period

The strength of your period determines the volume of your menstrual cup. For this, note how many tampons you need daily or how often you have to change sanitary napkins. Anything from 8 ml to 34 ml is possible. If you have heavier bleeding, a larger model is recommended.

  • Condition of the pelvic floor

The pelvic floor describes the musculature in the genital area. It is decisive for the degree of softness of the menstrual cup as well as for its diameter. Determine the condition of your pelvic floor a little more precisely. The more pronounced the pelvic area, the larger the menstrual cup must be.

  • Pregnancies

After a vaginal delivery, you usually have a heavier period and weakened pelvic floor muscles. In this case, experts recommend a larger version of the cup. Virgins will probably do better with a smaller size.

  • Sexual activity

Sexual activity equally affects the pelvic floor area and the female anatomy. Regular sexual intercourse is already enough as a factor to choose the next cup size.

  • Sportiness

The perfect fit of the menstrual cup is especially important in sports. Those who train their muscles here every day need above all a firm material that cannot be compressed too easily.

The right size of the menstrual cup

Palpating the cervix and determining its position

It is best to feel your cervix during your period, as its position usually changes during bleeding and it slides down. Important: of course, you must not be ashamed of yourself. Take enough time, a relaxed environment, and make sure your hands are freshly washed. The cervix is much firmer to the touch and feels like a lump in your vagina, with a depression in the middle. Some people notice it after only a few centimeters, others can’t even reach it with their finger.

Once you have found it, it is best to note its position on your finger. Then measure the length with a ruler and get the distance from the vaginal opening to the cervix. This is decisive for the total length of the menstrual cup.


  • Models that are too long interfere with the vaginal entrance and leave an unpleasant feeling of pressure.
  • Models that are too short move up too far in the vagina and are difficult to remove later.

If you don’t dare to feel the cervix yourself, you can get support and help from your gynecologist. He can choose a suitable menstrual cup together with you and inform you about your physique and the condition of the pelvic floor. In some cases, the cervix moves a lot during the period and can sometimes be felt in a different place in the morning than in the evening. Here it helps to rely on two different sizes.

Note: Almost every menstrual cup can still be shortened in length. So you only roughly decide on a model and later adjust the length individually to your own body feeling.

Instructions: Determine the condition of the pelvic floor

Your pelvic floor muscles influence the diameter and also the degree of softness of the menstrual cup. Very soft muscles require a rather weak material and a slightly larger diameter. The same applies to all mothers who have already given birth to children and may still have sensitive birth scars internally. If the muscles are strongly trained, a harder material is recommended in order not to deform the menstrual cup too much. Now let’s get to the test:

  • Wash your hands thoroughly.
  • Insert a finger into the vagina.
  • Pinch the muscles around your finger, similar to holding urine.
  • If you can feel the muscles and they lift up slightly, you have a strong pelvic floor.
  • If you can hardly feel anything, you have a fairly soft pelvic floor area.

It is also considered soft muscles if you lose urine when you cough or sneeze. For some women, this is especially the case after a vaginal delivery if they have not done any postpartum exercises. Maybe you can’t hold your full bladder for long? Then extensive pelvic floor training will help you to avoid incontinence in old age, for example.

change menstrual cup

What sizes do the manufacturers offer?

Most manufacturers only offer two sizes anyway, such as Lunette. Here, the selection is much easier and the length of the cups can be shortened individually. However, there are also companies that want to convince with different sizes, degrees of softness, and stems. Such an offer seems a bit confusing at first glance, but it serves the optimal fit for your body. You will find three different softness levels and extra small sizes with the shorty version.

Menstrual cups size chart

ModelVolumeLengthSizesSoftness Grade
Lunette25-30 ml72 mm1soft – normal
2a little firmer
Merula Cup38 -50 ml39-50 mmOne Sizenormal
Lena Menstrual Cup24-36 ml46-51 mmSnormal
DivaCup28-35 ml56-57 mm1soft – normal
2a little firmer
OrganiCup23-33 ml47-49 mmAnormal


The wrong size chosen – change menstrual cup

You can quickly recognize the wrong size of the menstrual cup by an unpleasant feeling. For example, it leaves too much pressure or is very difficult to insert. Some women experience a clear urge to urinate because it presses too hard on the bladder. Cups that are too small, on the other hand, do not seal properly, have too much play in the vagina and slip quickly.

So you can tell if it’s the wrong size by the following factors

How can I tell if the menstrual cup is too small?

  • does not seal properly;
  • blood runs past at the sides;
  • cup twists;
  • slips down too much;
  • slips upwards;
  • difficult to remove.

How can I tell if the menstrual cup is too big?

  • does not pop open/unfold properly;
  • difficult to insert;
  • causes a feeling of pressure;
  • increased urge to urinate;
  • causes pain;
  • uncomfortable to wear.

If you have chosen the wrong cup, an exchange is unfortunately no longer possible. After all, it is a medical and hygienic product that cannot be returned to the manufacturer after the first use. For this reason, many women worry about the right size. You can happily keep models that are too large until you may have children or your body situation changes. Models that are too small can also be given to a friend after a thorough cleaning.


However, if you think a little more about the different sizes and models beforehand, you will quickly find the right menstrual cup for you and won’t need to exchange it again.

Jessica Clavits

Jessica Clavits

Hi! I'm Jessica! I keep this blog about personal care.

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