Can the bigger the width of the cup cause you to get more cramps? Should I get one that is small in with to avoid this?
My experience was the stiffness of the cup, so I have softer ones.
We generally believe here that it's better to pick a larger cup that is soft, especially with a moderate to heavy flow, than a smaller cup that is firm, if you're looking to minimize you chances for pressure or cramps.
You get cramping if the cup rubs against your cervix, so I think a wider cup is sometimes the solution. Most people don't get cramps, or if they do they can fix it by inserting the cup differently, so don't worry about it at this stage and just get something that suits your flow and vaginal length.
In my experience: No. The thickness and stiffness of a rim can though! My first cup was a small MCUK, which I found difficult to insert and felt uncomfortable because the rim is so stiff, I currently use a 'large' Fleurcup because it's much softer in the rim and body and it holds much more for my heavy days. I'm 24 no kids.
I've used some of the wider cups (L Fleur, XL Meluna) and hardly get any cramps at all. However the L Fleur puts pressure on my bladder for the first half hour of wearing it, then it goes away. That doesn't happen with a Natural Mamma (a soft, long, narrower cup) or a L Meluna. I'd be interested to see what others experience about cup width affecting cramps... I have a feeling that everyone is different on this subject.