Date Created: 29 April 2026
Choosing the right menstrual disc size is one of the most important decisions you’ll make when switching to reusable period care. The right fit can mean the difference between all-day comfort and ongoing frustration.
If you’re unsure whether to choose a small or large menstrual disc, you’re not alone. This guide breaks it down clearly, so you can choose with confidence.
Why Menstrual Disc Size Matters
Unlike pads or tampons, a menstrual disc sits higher in the vaginal canal, just below the cervix. Because of this, size plays a key role in how well it stays in place, how comfortable it feels, and how effectively it prevents leaks.
A disc that is too small may not stay securely behind the pubic bone. A disc that is too large may feel uncomfortable or difficult to insert.
The goal is simple: a size that fits your body, stays in place, and feels like it’s barely there.
Small vs Large Menstrual Disc: What’s the Difference?
Small Menstrual Disc
- Diameter: 61mm
- Height: 35.2mm
- Capacity: 32ml (up to 5 regular tampons)
A small menstrual disc is generally suited for:
- People under the age of 30
- Those who have not given birth vaginally
- First-time menstrual disc users
- Those with a lower or more sensitive cervix
If you’re new to menstrual discs, starting with a smaller size can often feel easier and more comfortable.
Learn more about the small menstrual disc for under 30 or pre-pregnancy users.
Large Menstrual Disc
- Diameter: 68mm
- Height: 39.2mm
- Capacity: 61ml (up to 7 regular tampons)
A large menstrual disc is typically better suited for:
- People over the age of 30
- Those who have given birth vaginally
- Heavier menstrual flow
- Those who find smaller discs shift or leak
The larger size offers higher capacity and a more secure fit for many users.
See the full details on the large menstrual disc for over 30 or post-birth users.
How to Choose the Right Size for You
If you’re unsure which size to choose, start with these simple guidelines:
- Under 30 and no vaginal birth: Start with small
- Over 30 or have given birth vaginally: Start with large
- Heavy flow: Consider large for higher capacity
- Sensitivity or first-time use: Small may feel easier
These are general guidelines, not strict rules. Every body is different, and comfort is the most important factor.
For a deeper breakdown, visit the menstrual disc size guide.
What Happens If You Choose the Wrong Size?
Choosing the wrong size doesn’t mean menstrual discs won’t work for you. It simply means the fit may not be ideal.
Signs your disc may be too small:
- It doesn’t stay behind the pubic bone
- It shifts during movement
- You experience leaks even when inserted correctly
Signs your disc may be too large:
- It feels uncomfortable or too firm
- Insertion feels difficult
- You feel pressure or awareness during wear
If you experience fit issues, it’s often worth adjusting size rather than giving up entirely.
Does Cervix Height Affect Size?
Yes, your cervix position can influence how a menstrual disc fits.
If you have a lower cervix, a smaller disc may feel more comfortable and easier to position. If your cervix sits higher, a larger disc may provide a more secure fit.
If you’re unsure, you can measure your cervix height at home to guide your decision.
Why Many People Choose the my mimi Menstrual Disc
The my mimi menstrual disc is designed with both sizes in mind, offering a practical solution for different body types and flow levels.
- Two size options for a better personalised fit
- High capacity for up to 12 hours of wear
- Loop tab for easier removal
- Soft, flexible design for comfort during daily use
It’s a simple approach: choose the size that fits your body, and everything else becomes easier.
Final Thoughts: Small or Large?
If you’re deciding between small and large, the best choice is the one that feels right for your body and your lifestyle.
Start with the guideline that fits your situation, and adjust if needed. Once you find the right size, a menstrual disc can feel comfortable, reliable, and easy to use.
If you’re ready to make the switch, explore the my mimi menstrual disc and find the size that works for you.
Health Notice: This article is for information purposes only. It is not a substitute for medical advice. If you are experiencing symptoms of anxiety, depression or other mental health concerns, consult a qualified health professional.
