How do I choose the right menstrual cup for me? Which size is right for me?

 
finding the right menstrual cup

Even though we have a wide range of models and sizes, we've made it as easy as possible for you to find the perfect cup for yourself. The following criteria will help you:

 
 

Pelvic floor

The term "pelvic floor" describes the muscle structure in the pelvic cavity and moves, by contracting, relaxing, and what is known as reflexive...

more information
 

Cervix

Did you know that your cervix moves over the course of your cycle? For many women who follow the sympto-thermal method (NFP)

read on
 

Flow

The strength of your period flow is similarly important in selecting the right cup. Once you've found the right length...

discover more
 

Age

As a rule, the size of the cup is more important than its length. If your cervix sits in a particularly high position, or you've already had a child...

learn more
 
 
 

The strength of the pelvic floor

The term "pelvic floor" describes the muscle structure in the pelvic cavity and moves, by contracting, relaxing, and what is known as reflexive grip, to ensure that liquid can only pass through when the woman wants to release it. When this muscle structure works less effectively (e.g., after giving birth or following an operation, etc.) the result is known as pelvic floor weakness. A weak pelvic floor can be strengthened and partially restored via targeted cone exercises.

We now understand what the pelvic floor is, and what it can do. However, how can you find out what yours looks like? How do you discover which cup is right for your own pelvic floor?

Our cups are divided into in five different grades of hardness (see also our table of sizes). Depending on which of the following categories you fit into, you can select the appropriate degree of hardness. The stronger your pelvic floor, the stronger the cup should be, as a cup that is too soft can be crushed by a stronger pelvic floor when worn, diminishing the effectiveness of the seal.

We have assessed differing pelvic floor strengths subjectively, and the guidance is designed to provide additional help for you to reach a decision. The right cup for you is one that fits tightly and can't be felt when worn.

  1. Weak pelvic floor – urine is lost uncontrollably

  2. Mediocre pelvic floor – drops of urine leak out when you sneeze or jump

  3. Good pelvic floor – no urine is lost, but you cannot tense your muscles and stop a stream in full flow when urinating

  4. Very good pelvic floor – tensing, stopping urine, and "playing a tune" are all options that women with a very good pelvic floor will be familiar with.

  5. Nutcracker pelvic floor – please don't try to crack any actual nuts, but if you do a lot of sport or practise yoga, that should theoretically be possible.

Normally, women who've previously given birth have a weaker pelvic floor. A cup with a hardness rating of five can, therefore, be excluded as an option for most mothers. However, sport and targeted training can strengthen and condition the pelvic floor, allowing a harder cup to be chosen over time.

 
 

Cervical length

Did you know that your cervix moves over the course of your cycle? For many women who follow the sympto-thermal method (NFP), this is common knowledge - but for others, it's completely uncharted territory.

However, choosing the right menstrual cup requires you to get to know yourself a little better and measuring the length between the cervix and the vaginal entrance. This is the only way that you can be sure that the cup will fit correctly and that you won't feel it when it's inserted.

As the cervix can move, the size of the gap should be measured regularly during the period. This value is vital in selecting the right menstrual cup. If possible, you should take two or three measurements on different days, as the size of the gap can vary during the period.

To measure your cervical length, insert a finger into your vagina (don't forget to wash your hands first!) and press against the lump at the end of the vagina towards the back. The lump feels like the tip of your nose and is feels significantly different from the rest of the mucous membrane.

Using your finger, you can now measure the exact length with a ruler. The right cup should not exceed this length (when measured without the stem). Alternatively, choose a cup with a larger diameter so that the cervix can be placed inside - consider that the presence of the cervix in the cup reduces the available volume.

Tip: as the cervix generally changes over the course of the period, it can be worthwhile to obtain a second cup with a different length and volume. This means that you always have the optimal size and shape for any given day.

 
 

The heaviness of your flow

The strength of your period flow is similarly important in selecting the right cup. Once you've found the right length, you can calculate the appropriate volume.

On average, women lose around 40 to 50 ml of blood during their periods. A "heavy flow" occurs when a woman during a normal-length period of five to seven days loses around 80 ml of blood. A menstrual cup is designed so that it does not need to be changed for up to 12 hours during an average flow.

 
 

Age and history of giving birth

As a rule, the size of the cup is more important than its length. If your cervix sits in a particularly high position, or you've already had a child, you'll need a larger cup. We recommend a smaller cup for girls and young women. However, if you already know that you experience exceptionally heavy bleeding, you should choose a larger cup.

Although height and age also play a role, our experience suggests that the condition of your pelvic floor and the length of your cervix make the biggest difference.

Younger women, up to the age of about 25, tend to be rather "tighter" - which means that the vaginal corridor is more muscular. These women often require a cup with a smaller diameter.

To make your decision easier, we've put together a sizing table.

 
If you have any further questions, feel free to contact us at shop@untertasse.com!