I've been doing a lot of investigating over the past month or so and reading up on sizes. I was told to measure how far back my cervix is, in order to find how long of a cup my body could accommodate. I've measured both on and off of my period, and it's been a consistent 3 inches (It moves to the left during my period, but stays in the same location).
The diva cup is 5.3cm, and 3 inches is 7.6cm, so I should have plenty of room right-o? I am super paranoid about ordering an incorrect size! bah! Especially because, capacity wise, I could probably go quite a lot smaller.
The other cup I was considering was a medium Meluna (complete opposite side of the spectrum, length wise). But I am paranoid about that cup being too wide (it's 4.5cm, the diva is 4.3cm). I am 19 and pre-childbirth.
How do I know if I am ordering a cup that is the right width?