Reusable Menstrual Discs Australia | Award Winning - my mimi

what size menstrual disc should i get?

Date Updated: 7 June 2026 · Read Time: 4 minutes

Size guide

What Size Menstrual Disc Should I Get?

Choosing the right menstrual disc size is one of the most important steps in getting a comfortable, secure fit. The right size can help reduce leaks, improve comfort and make your overall experience with a reusable menstrual disc much easier.

The my mimi menstrual disc comes in two sizes, Small and Large. Use the guide below, then take the quick size quiz for a personalised recommendation.

Quick answer

Most people choose based on age, birth history and comfort

The Small is often recommended for people under 30 who have not given birth vaginally. The Large is often recommended for people over 30, those who have given birth vaginally, or anyone wanting higher capacity on heavier flow days.

Why sizing matters

A better fit can mean fewer leaks

A well-fitting menstrual disc should sit comfortably in the vaginal fornix and stay tucked behind the pubic bone. When the size is right, the disc can collect fluid effectively without shifting or causing pressure.

If your disc feels unstable, leaks often or moves out of place, it may be too small. If it feels uncomfortable or creates pressure, it may be too large.

The my mimi sizing guide

Small

Small, 32ml capacity

Usually recommended for people under 30 who have not given birth vaginally, or anyone who prefers a slightly smaller fit.

Holds up to around 5 regular tampons
Great for light to medium flow
Often suited to beginners or smaller anatomy

Large

Large, 61ml capacity

Usually recommended for people over 30, those who have given birth vaginally, or anyone wanting higher capacity on heavier flow days.

Holds up to around 7 regular tampons
Higher capacity for heavier flow
Often suited after vaginal birth or over 30

What affects menstrual disc size?

Menstrual disc sizing is not only about flow. Age, vaginal birth, cervix height and comfort preferences can all affect which disc feels better in your body.

Flow can still matter. If you have a heavier flow, you may prefer the Large for higher capacity, even if the Small is your usual starting point.

Fit signs

How do you know if the size is right?

A well-fitting menstrual disc should feel secure, comfortable and almost unnoticeable once inserted correctly.

You cannot strongly feel it during normal movement
It stays tucked behind the pubic bone
It does not slip down or feel like it is falling out
It does not create pressure or discomfort
It gives reliable leak protection when positioned correctly

When to consider Small

Small may suit you if you are under 30, have not given birth vaginally, have a lower cervix, or prefer a slightly smaller fit.

Shop the Small disc

When to consider Large

Large may suit you if you are over 30, have given birth vaginally, have a heavier flow, or want higher capacity.

Shop the Large disc

Why my mimi

Two sizes, one better fit

The my mimi menstrual disc is designed to make reusable period care easier to start. It is soft, suction-free, made from medical-grade silicone and available in two sizes so you can choose a better fit for your body.

Small 32ml capacity

Large 61ml capacity

2 sizes More fit options

Loop tab Easier removal support

Suction-free No cup-style suction

Reusable Long-term value

Helpful next reads

How to use a menstrual disc Why is my menstrual disc leaking? Beginner guide

Shop the my mimi disc Explore bundles

Health Notice: This information supports your wellbeing journey, but it is not a substitute for professional medical advice. If you experience pain, ongoing discomfort, unusual symptoms or difficulty removing your disc, speak with a qualified health professional.