MeLuna sizing starts with cup height, then diameter. First decide whether you need Standard or Shorty. Then use birth history, flow, previous cup fit, and capacity needs to choose Small, Medium, Large, or XL.
Already know which cup height you need?
New to menstrual cups? Continue below and we’ll guide you through the sizing process step by step.
Cup height affects comfort, stability, reach, and capacity. Choose height before diameter because your ideal size may change when you switch from Standard to Shorty.
Best for an average or high cervix and for users who have enough internal space for a full-height cup.
Best for a confirmed low cervix or when a standard-height cup feels too long, presses, or sits too low.
With an average or high cervix, a Shorty cup may have more room to tilt or tip over. This can break the seal and cause leaks. Choose Shorty because a standard-height cup is too long, not because a shorter cup appears easier.
Use the simplified chart for a quick starting point. Then review the complete Standard chart for measurements, capacity, and more detailed recommendations.
Use birth history, flow, and general fit needs to identify a practical Standard size starting point.
Use this chart when you want exact cup dimensions, capacity, and more detailed size guidance.
Compare Small, Medium, Large, and XL by diameter, cup-body height, capacity, and general fit guidance.
Users with multiple vaginal births frequently require the 47 mm XL diameter for a dependable seal. Prior cup fit and leak history should still be considered.
If your current cup opens but still leaks, slides down, or feels unstable, compare your symptoms with this troubleshooting guide.
Use your current cup's performance to identify whether another MeLuna diameter may provide a better seal.
Use the quiz for guided recommendations or compare your current brand with MeLuna.
Choosing Shorty does not always mean choosing the same diameter. The shorter cup body holds less fluid, so some users choose a larger diameter to preserve more capacity.
| Current Standard size | Possible Shorty starting point | Why |
|---|---|---|
| Small | Small or Medium | Depends on seal, anatomy, and capacity needs |
| Medium | Medium or Large | A wider Shorty may restore some lost capacity |
| Large | Large or XL | XL is often chosen when more Shorty capacity is needed |
| XL | XL | Highest Shorty diameter and capacity |
These are starting points, not automatic conversions. Flow, vaginal birth history, pelvic support, and prior fit all matter.
Use Shorty only when cervix height is low or a standard cup body is too long. Then choose the diameter that provides the best seal and enough capacity for your flow.
Compare Shorty Small, Medium, Large, and XL by diameter, height, capacity, birth history, and flow guidance.
Shorty XL provides the widest diameter and highest capacity in the Shorty line. Users with multiple vaginal births almost always require XL, unless previous fit history clearly points to another diameter.
Use the chart that most closely matches the shape and height of your current cup.
Use this guide when your current cup feels too long, sits too low, sticks out, or causes pressure.
Compare common height and fit problems with possible MeLuna Shorty solutions.
Use this guide when your current cup leaks, feels too long, creates pressure, or does not provide the fit you need.
Compare your current cup's performance with possible MeLuna height and diameter solutions.
Use the low cervix guide for more detail, or complete the quiz for a personalized recommendation.
The Cup Quiz and personal recommendations consider cervix height, previous cup fit, flow, vaginal birth history, exercise, capacity, and comfort concerns.
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