Having had a c section and a normal delivery, and being over 30 I definitely fall into the category of needing the larger cup, however because the diva cup is a very stiff silicone material it is very unforgiving fit wise, so being someone with a high cervix and no residual stress incontinence this cup may be a bit too big, evidenced by the …
https://www.amazon.com/DivaCup-Model-2-Menstrual-Cup/dp/B000FAG6XA

