Which menstrual cup size to choose? How to choose the size of the menstrual cup?

What size menstrual cup should I choose?

Choosing the right size of menstrual cup is important, so here's what you need to know to make the right choice and find the ideal model that will allow you to forget your period.

Many brands of menstrual cups advise you to choose the size of your cup according to your age or whether you had a vaginal delivery or not, and it's true that it seems simple.

But there's a problem: it's anatomically wrong.

In addition, saying this maintains a preconceived idea about the bodies of people over 30 and mothers: their vagina would be softer, wider than before. This is simply not true (even if it is important to pamper your perineum and make sure that it remains toned throughout your life)

There is a nuance however: the size of a menstrual cup is its diameter, its capacity, but also its height. And this height is important, because if the vagina is very extensible in width, the cervix can be placed more or less low according to your anatomy. So if you have a low cervix and choose a 'high' menstrual cup (and even more so if it has a stem), you risk discomfort and leakage. On La Cup Luneale , there is no stem, so this is less of an issue: it's more convenient for us to offer you this very simple size guide (but we like to explain things in detail)!

 

In reality, when choosing the size of your menstrual cup, only the flow counts.

Many people find it difficult to estimate the amount of blood loss with conventional sanitary protection (tampon or pad). This is normal! The use of a menstrual cup has the beneficial effect (among others) of allowing you to know your period better.
The width of your vagina does not really matter, because the walls of the vagina always touch each other if there is nothing inside.
Moreover, to use a telling image, if you are used to using tampons, you have given birth and you have a weak flow, you opt for small tampons, and they do not fall out of your vagina. For your menstrual cup, it's the same! The 3mm difference in diameter between the different types of cups is not an obstacle to their comfort or their fit.

From an anatomical point of view :

  • The cup cannot be too small. We have written a full article on this subject.
  • The cup cannot be too large, as the vagina is the most elastic part of the human body.

However, if you have never had sex or have vaginismus, the size L may be impressive (although this is not true in all cases, and depends on your relationship with your body).

This is why in these 2 cases only, we advise to start with a size S or M, even if anatomically, a size L would not be a problem.

How do I know my flow?

We have set up an equivalence system to help you easily choose the right model for you.

Choose La Cup size S if you have a light to medium flow, i.e. at the height of your flow:

  • You are wearing Classic / Normal / Regular tampons
  • You can keep your towel for more than 6 hours before it overflows
Dimensions of La Cup Luneale S : Useful capacity 20ml | Diameter 40mm | Height 50mm

Choose La Cup size M if you have a medium to heavy flow, i.e. at the height of your flow:

  • You wear Super / Maxi tampons
  • You can keep your towel between 3 and 6 hours before it overflows
Dimensions of La Cup Luneale M : Useful capacity 25ml | Diameter 43mm | Height 52mm

Choose La Cup size L if you have a heavy to very heavy flow, i.e. at the height of your flow:

  • You wear SuperPlus tampons
  • You can only keep your towel for less than 3 hours before it overflows
Dimensions of La Cup Luneale L : Useful capacity 30ml | Diameter 46mm | Height 51,5mm

If you come from another brand of menstrual cup:

  • If after 8 hours it is still half full/empty: choose a smaller capacity
  • If you are happy with its capacity (full or almost full after 8 hours): choose an equivalent capacity
  • If you find that it gets full too quickly: choose a larger capacity.

BONUS: our infographic to choose your cup size at a glance:

insert image

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