Quick answer
Choose your first menstrual cup size by matching your flow and cervix height: a smaller cup suits light-to-medium flow or a low cervix, while a larger cup fits heavier flow or a high cervix.
Why size matters more than brand
The right cup size affects comfort, leak protection, and how easy the cup is to insert and remove. A cup that's too large can press on your bladder or cervix, causing discomfort. A cup that's too small may leak or be hard to reach.
Your anatomy and flow can change over time—after childbirth, with age, or even during a single period. That's why many people keep two sizes on hand.
When two sizes are worth it
If your flow varies from light to heavy, or your cervix height shifts during your period, a single cup may not fit every day. A duo pack gives you both sizes so you can switch as needed, without buying two separate cups.
This is especially helpful if you're new to cups and aren't sure which size fits best. Starting with both sizes lets you test and compare in your first cycle.
Step-by-step sizing process
- Step 1: Assess your flow: Estimate whether your flow is light, medium, or heavy. On heavy days, a larger cup holds more fluid and needs fewer emptying trips. On light days, a smaller cup is easier to insert and remove. Checkpoint: If you're between sizes, choose the smaller one for comfort unless heavy flow is a concern.
- Step 2: Check your cervix height: Insert a clean finger during your period and feel for your cervix. If you can reach it with your fingertip, you likely have a low cervix and a shorter cup works better. If you can't reach it easily, a longer cup may be needed. Checkpoint: Cervix height can change during your period, so it's worth checking more than once.
- Step 3: Consider your comfort and sensitivity: If you've experienced bladder sensitivity, cramping, or discomfort with firmer cups, choose a softer cup. Soft silicone can reduce pressure while still providing reliable protection. Checkpoint: A softer cup may be slightly trickier to unfold, so practice insertion before your period starts.
- Step 4: Decide between one size or a duo: If your flow is consistently light-to-medium and your cervix height is stable, one size may suffice. If you're unsure or your flow varies, a duo pack gives you flexibility to switch as needed. Checkpoint: Buying a duo pack can be more cost-effective than purchasing two single cups separately.
Saalt cups that help
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Saalt Soft Duo Pack: The Saalt Soft Duo Pack includes both sizes of our ultra-soft silicone cups. This lets you try both sizes in one purchase, so you can find the right fit for your flow and cervix height without buying two separate cups.
Saalt Soft Duo Pack
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Saalt Soft Cup: The Saalt Soft Cup is made with an ultra-soft silicone formula designed for those with bladder sensitivity or discomfort with firmer cups. If you're sensitive to pressure, this softer option can make your first cup experience more comfortable.
Saalt Soft Cup
