Keeper & Moon Cup (US) vs. MermaidCup | Menstrual Cup Comparison










Small (B)
45 mm
79 mm
54 mm
25 mm
21 ml
25 ml
4.5 /5
4 /5
4 /5

Large (A)
46 mm
79 mm
54 mm
25 mm
25 ml
29 ml
4.5 /5
4 /5
4 /5
Soft
Small (1)
42 mm
76 mm
52 mm
24 mm
16 ml
28 ml
2 /5
1.5 /5
2 /5
Soft
Large (2)
46 mm
79 mm
57 mm
22 mm
20 ml
34 ml
2 /5
1.5 /5
2 /5
Firm
Small (1)
42 mm
76 mm
52 mm
24 mm
16 ml
28 ml
3.5 /5
3 /5
3.5 /5
Firm
Large (2)
46 mm
79 mm
57 mm
22 mm
20 ml
34 ml
3.5 /5
3 /5
3.5 /5
Found any errors in our measurements? Let us know!
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