Date Updated: 27th of January 2026
Read Time: 5 minutes

Can a menstrual disc be too big?

Understanding menstrual disc sizing and comfort

Reusable menstrual discs are popular for their comfort, longer wear time, and reduced waste. A common question, especially for first-time users, is whether a menstrual disc can be too large.

The short answer is yes, but fit depends on your body, life stage, and how the disc is inserted. Choosing the correct size supports both comfort and leak protection. Below, we explain what happens when a disc is too big and how my mimi, Australia’s award-winning menstrual disc brand, helps simplify sizing.

How menstrual disc sizing works

A menstrual disc sits in the vaginal fornix, high in the vaginal canal, and tucks behind the pubic bone. Unlike cups, discs do not rely on suction to stay in place, which means correct sizing is important.

If a disc is too large for your body, you may notice:

• Difficulty inserting or removing the disc
• A sensation of pressure or fullness
• The disc slipping or failing to stay tucked behind the pubic bone

When sized correctly, a disc should feel secure but essentially unnoticeable once in place.

Signs your menstrual disc may be too big

Most users should not feel their disc during wear. If you are constantly aware of it, that can indicate a sizing issue.

Other signs include mild discomfort, pressure near the cervix, or small leaks caused by the disc not sitting flush behind the pubic bone. In these cases, adjusting your insertion technique or switching to a smaller size can help.

Choosing the right size with my mimi

my mimi offers two sizes, designed to suit different anatomies and life stages:

• Small: 61mm diameter, 35.2mm tall, holds 32ml – generally suited to those under 30 or who have not given birth vaginally
• Large: 68mm diameter, 39.2mm tall, holds 61ml – commonly recommended for those over 30 or who have given birth vaginally

The soft, medical-grade silicone and flexible rim help the disc adapt to your body. The built-in loop tab also supports easier, more controlled removal.

If you are unsure which size is best, the menstrual disc size guide walks through sizing considerations in more detail.

Does a bigger menstrual disc hold more?

Yes. Larger discs typically have a higher capacity, which can be helpful on heavier flow days.

The Large my mimi menstrual disc holds up to the equivalent of around seven regular tampons. That said, capacity should not come at the expense of comfort. A slightly smaller disc that fits well is often more effective than a larger one that shifts.

Tips for improving comfort

If your disc feels uncomfortable, these adjustments may help:

• Angle matters: Insert the disc at a slight downward angle toward your tailbone
• Re-check placement: Ensure the front rim is tucked securely behind the pubic bone
• Try a different size: Switching to the Small my mimi disc may improve comfort
• Relax your pelvic floor: Tension can make insertion and positioning harder

You can also follow the step-by-step instructions in the how to use a menstrual disc guide.

Why choose my mimi?

my mimi is a trusted and established brand, used by thousands of customers across Australia. It was awarded “Best Sustainable Period Care Solution in Australia 2025” and is designed with real bodies in mind.

• Made from medical-grade silicone
• TGA-compliant and FDA-registered
• Designed for up to 12 hours of wear
• Costs around 83 cents per month over a five-year lifespan
• Fast shipping across Australia and New Zealand

Final thoughts

A menstrual disc can feel too big if it does not suit your anatomy or is not positioned correctly. Comfort comes from choosing the right size and taking a little time to learn proper placement.

With two size options, a soft design, and a loop tab for easier removal, my mimi offers a more personalised and comfortable approach to reusable period care.

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.