Which size?

The Mooncup and MCUK are available in two sizes:‘A’ and ‘B’. Size A measures 46mm in diameter and 50mm in length. Size B measures 43 mm in diameter and 50mm in length. Both sizes have a pull stem 21mm long, which you can trim to the length that is right for you.

Sizing is based on pelvic floor tone, not menstrual flow, and it’s important to get the sizing right to get the best from your Mooncup or MCUK. Pelvic floor tone will vary according to your age, childbearing history and what sort of exercise you do. Corrective surgery to the vagina will also have implications. Check the guidelines to see which size you need:

Size Table

Size Size A

Because vaginal and pelvic floor tones naturally reduce with age, the size ‘A’ is recommended for women aged 30 or over. The difference between the ‘A’ and the ‘B’ is only small (3mm), but it is crucial!

Size ‘A’ is also recommended for all women who have given birth vaginally, regardless of age.

Size Size A

Designed for young girls and women under the age of 30 who have not given birth vaginally. It may also be suitable for women over the age of 30 who have had corrective surgery to the vagina, or who are advanced in tone-maintaining activities such as yoga, dance or pilates.

If you’re unsure of what size you need, please contact our Advice Team

» back to top

Testimonials

I've been using the mooncup for about 10 months. I thought it was the best invention ever. The most positive thing about it is the environmental impact (zero). Next is the impact on your body (zero). Next is the convenience (I have a heavy period, and still only empty it once a day). My body has now adjusted to it, and I can barely fit a tampon in anymore, it feels dry and unnatural. My only problem is that it doesn't work overnight for me, but it did take me over 4 cycles to even get the hang of it during the day, so I'm not giving up. I could go on forever, but all I will say is that it's a great investment. The positives completely outway the negatives. Definitely give it a go.
Jessi, 18
Read more »

How to use


Buy now

order online

Buy a Mooncup online or find your nearest stockist

Mooncup is available at Boots and independent shops everywhere