Diameter
The width of the cup at its widest listed point. MonthlyCup’s published models list 37 mm, 43 mm and 47 mm diameters.
Dimension literacy
Numbers help. Assumptions get loud.
A menstrual cup size chart is not a diagnosis, a promise or a shortcut around instructions. It is a set of physical product measurements that can help you compare models more thoughtfully.
37–47mm diameter range
45–55mm cup length range
15–43ml to holes
Read the label
Four terms matter before any preference talk.
Cup length
The length of the cup body without treating the full product as one number. MonthlyCup lists 45 mm for Mini and 55 mm for Normal and Plus.
Total length
The full listed length including the stem. MonthlyCup lists 55 mm for Mini and 65 mm for Normal and Plus.
Capacity to holes
The amount listed up to the holes: 15 ml for Mini, 22 ml for Normal and 43 ml for Plus in the published guide.
Instructions
Product instructions matter. MonthlyCup says to follow the supplied instructions, including cleaning and storage guidance.
Personal preference
MonthlyCup advises comparing measurements alongside individual flow and preferences. That is different from claiming a universal rule.
Avoid these shortcuts
Three common sizing leaps to slow down.
- “I am a certain age, so I need this size.” MonthlyCup’s guide does not support age alone as a size rule.
- “Childbirth decides the model.” The guide says childbirth alone is not a size rule.
- “A larger capacity means a better fit.” Capacity is one product measurement. It does not guarantee fit or leak prevention.
Use and care boundaries
Instructions are part of the product, not fine print.
MonthlyCup’s guide instructs users to wash hands, empty according to flow and no later than 12 hours, and release the seal before removal instead of pulling the stem alone. It also says to boil before first use and between periods as instructed, dry fully and store with air circulation.
The guide says to replace silicone that is damaged, sticky or noticeably changed. This site does not add a fixed lifespan claim.
Care note: This is a bounded summary of manufacturer instructions. Always follow the current instruction manual supplied with your product.
Need the current MonthlyCup wording?
Use the live guide for the manufacturer’s current model comparison and instructions. For medical concerns, use appropriate healthcare advice rather than a product-support page.
Dimension FAQ
Is total length the same as cup length?
Not in the MonthlyCup guide. Cup length refers to the cup body, while total length includes the stem.
Can I choose only by capacity?
Capacity can help you compare models, but it does not guarantee fit or leak prevention.
How often does MonthlyCup say to empty the cup?
MonthlyCup’s guide says to empty according to flow and no later than 12 hours.
Should I pull the stem to remove the cup?
MonthlyCup’s guide says to release the seal before removal instead of pulling the stem alone.