This is what I am currently using and I love it. The length and width is perfect for me. This morning though I was sat down and had the ‘uh oh’ moment just before I popped out. I’d been wearing it for the past 4 and a bit days with no problem so I think the problem was the shorts I was wearing at time. I have a 50 mm ring and can just get my little finger tip inside when wearing. It’s also a real chore to get the ring on in the first place - the 2nd ball just doesn’t want to play a lot of the time - so I don’t think it’s too big? I think I need a ring with a ball splitter to help them stay put... it’s always the left one that makes a bit for freedom.