Merula XL Review – The Ultimate High Capacity Menstrual Cup?

merula xl review

Merula XL Review – The Ultimate High Capacity Menstrual Cup?

As someone with a heavy flow 2-3 days out of my cycle, I quickly realized that the capacity of my regular menstrual cup wasn’t enough. I started searching for a high-capacity menstrual cup and found that there are several on the market!

While there are a few brands who make a menstrual cup upwards of 38mls in capacity, a standard large cup is typically around 30, the Merula XL breaks the mold with a 50ml capacity!

I’ve been testing out this cup for the past few months and will share details with you!

merula xl review

I use both cloth pads and menstrual cups. I have whole cycles where I wear all pads and rarely use a cup and I have cycles where I mostly use a cup and just a few pads. My activities and my ability to get to and store supplies is a big factor. For example, on a heavy flow day if I have to run errands I’d rather use a high capacity menstrual cup that I don’t need to tend to when I’m out rather then pads and deal with gushing. If I’m home I may use mostly pads.

I quickly realized that I can fill a 30ml cup quickly on a heavy flow day and started looking for something larger. I’ve tested out many high capacity menstrual cups including the Yuuki size 2, LaliCup large, XO Flow large, Merula Classic and the Super Jennie Large.

I couldn’t wait to test out the Merula XL.

Merula XL details:

  • Made from 100% medical grade silicone
  • Made in Germany
  • Recommended for medium to high cervix height
  • Available currently in colors:
    • Midnight (black)
    • Strawberry (pink)
    • Fox (orange)
  • Diameter: 46 mm / 1.81 in
  • Adjustable ladder length:
    • length from the 1st ring: 72 mm / 2.84 in.
    • length from the 2nd ring: 61 mm / 2.40 in.
  • Cup body length (without stem): 50 mm / 1.97 in.
  • Volume/capacity to the top edge: 50 ml / 1.69 fl oz
  • No vent holes
  • Very smooth body
  • Firm but squishy silicone body
  • Can be worn up to 12 hours
  • Recommended cleaning = boiling 5 minutes with a “pinch of vinegar”

merula XL review

merula XL review

merula XL review

merula XL review

How does the Merula XL compare to other high capacity menstrual cups?

From left to right:

merula XL review

merula XL review

Overall Impression

If I need to have my cup last a number of hours on a high capacity day this is the cup I go with! I do recommend it with a few notes.

At first, I thought, there is no way I’ll fit this whole thing in my vagina. I mean, I’ve had 4 babies but…every so often I find a cup size intimidating. However, it wasn’t as large as I expected, I dove in, used a punch down fold and find it to be comfortable to wear! The silicone feels a bit spongy and isn’t too firm nor too soft.

I do have to note that this cup seems to be unforgiving. For example. This morning I put in my Lunette size 2 and I couldn’t get the rim completely open. I swiped around it with my finger, pushed the side of my vaginal wall and nothing. However, I knew that if I walked around a bit it would pop open and a few moments later it did!

The Merula XL doesn’t do this for me. If I don’t get it in right the first time I have leaks. For this reason, I make sure to spend time ensuring that the rim is open. My cervix is pointed inside the cup and not off to the side and the cup isn’t still partially folded at the rim.

Like the Merula Classic, this cup can feel closed or suctioned but it opens up as it fills and as long as the top is open and unfolded it works really well for me and fits around my cervix. Merulas tend to fit like a little cervix beanie as one friend put it or like a little hug for your cervix.

How long can I go before emptying?

This is really a gem. I can typically go around 4 hours with other high-capacity menstrual cups and maybe 2 with a traditional large menstrual cup (30 mls). However, I have gone for almost 8 hours with the Merula XL! I left it in a few times just to see if I could wait until it leaked…and nope. I took it out before bed just to see how high the level was and I wasn’t even up at the rim!

Where to purchase a Merula XL (my affiliates):

Recommended retailers who ship to the USA include Femininewear  & you can use coupon GREENVAG to save 10% –>

Amazon. de Amazon Germany ships Merula to the USA & Canada as well as many other countries! Sorry, no coupon. (affiliate) –>

Ebay USA – I have mixed feelings about eBay. However, there seem to be some reputable sellers and there is great buyer protection. See Merula available here –>

Merula USA/Canada BST & Chat Group via Facebook. 

merula xl compared to merula classic

 (Pinterest images below to pin article )

38 comments / Add your comment below

    1. I’ve had 4 babies! After giving birth you should wait the 6 weeks or so that your doctor recommends before inserting anything. Then, like any other cup decision check your cervix height and go from there. Cups vary greatly in length and your cervix is typically lower during your cycle. Do you already have a cup to get an idea of length and diameter? You can join The Green Vagina chat too and we can help in there! 🙂

      1. Thanks for replying! I do have one already, it’s a small 15 ml one. My due date is coming up, so I wanna be prepared for when I need it again.

    2. The sizes for these cups should be more by flow than anything. If you have a very heavy flow you would want the XL. If not, go with the OS. The XL is a little bit more bulbous than the os so you may want to take that into consideration if you are very petite.

  1. I’m glad there are cups for heavy flow users like you. I don’t think I’ll ever need one that large, but I’m glad they can help others!

  2. Thank you for this! It’s always so helpful to read reviews from people who have used multiple cups to help compare.

  3. Ever since it went on the market, I’ve wanted to try the merula XL, but I’ve also always felt a little intimidated by the size. I’m a virgin and I used to be apprehensive about using a menstrual cup at all (I’ve tried several now). I’ve been using the lena L and it’s been okay but the rim is a little irritating sometimes. I think that’s due to the fact that it’s flared, not the size itself, and the rim diameter is 45 mm, so hopefully the merula XL will be okay too. I’m kind of worried though bc the lena has a much wider rim than body, while the merula XL is quite bulbous all around. I’d still love to win this cup in a giveaway just to try it though!

  4. I’ve been really curious about this cup for my heavy days, and now I definitely want to try it out. Thank you for the comparison photos — I find them super helpful!

  5. I love how thorough these are!! Comparing them to other cups, especially with pictures, helps me to really see how it looks and if it might work for me. Keep it up! 🙂

  6. I tried the size two Lena and it was uncomfortable for me to take out. This probably wouldn’t work for me huh?

    1. It depends on why it was uncomfortable. The Lena can be on the firmer and thicker side silicone wise. Was it too firm or too long? Or just the diameter in general? Are you in The Green Vagina Chat on Facebook? We can chat there too!

  7. This cup is so smooth and soft too! Definitely not as soft as the Super Jennie…I squish that cup doing regular activities and you can’t beat the capacity! Great for going a long time on heavy days when I really need to.

  8. I would love to try the Merula XL, just wish it wasn’t so darned expensive! Thanks for doing such a great review. 🙂

  9. I was thinking a about buying the super Jenny cup because I am running to the restroom every hour my first few days. I didn’t even know other companies had high capacity cups. Thank you for the review.

  10. It sounds like I may have to give this cup a try! My current cup is overflowing within 4 hours for the first two days of my period. It’s such a pain! This cup may be just what I need.

  11. Thank you for your extremely detailed review of this cup. I always appreciate all the information you include in your reviews. I’d love to try the merula XL!

  12. This was very informative. I’ve been looking for another bigger cup as I am extremely heavy and always leak through my super jennie. And I can’t always make it to the bathroom to change.

  13. The merula XL seems like a great cup. I just wish they’d release it in more colors! Lol, but seriously, I’m really hoping to try this cup, more colors or not.

    1. So far it’s in black, orange and pink and with all of the amazing colors the company has & the popularity of this cup I bet more will come out!

  14. I wonder how it compares to the Venus cup L, which holds slightly less but still an impressive amount at 47 mL. Red Herring did a squish test and th Venus seems clearly softer and is also a little longer and has a slightly wider diameter (47 mm) but I’m still waiting for someone to do an info/unboxing vid or a review on the Venus, especially in comparison to the merula XL since those two are the highest capacity cups on the market right now.

    1. I haven’t tried it but I’ll put it on my to-try list! I bet she’ll do a full review, she always has great info 🙂

  15. I tend to always leak with my cup overnight because I bleed so heavy, so this looks like something I’ve got to try!

  16. Who would you recommend the merula XL to or the merula OS to? Like how does one decide which will likely suit them better?

    1. I recommend the Merula OS & the XL frequently. The XL I recommend to people who really need the high capacity or who don’t want to or can’t empty as often because of schedule or work etc. and have a higher flow. I do recommend the OS for people with a shorter cervix height because the XL is a longer cup recommended for medium to high cervix BUT I have a high cervix and the OS is great for me…once I get it popped open. I have a full OS review here –>

  17. I just recently saw the merula XL available on amazon US but it was selling for $69, which seems way off. If you buy from, the conversion from euros to USD gives you about $33 (sometimes the prices of it in certain colors fluctuate).

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