ManCage device for my measurements? (chastity / chastity cage)

I’m new to the idea of trying out chastity and I was wondering if anyone owns a ManCage device. I’ve been looking at number 6; after measuring myself, I need a ring size of 55mm and a tube length between 4-4.5 inches. Would the ManCage number 6 fit me? Or can someone suggest another device that would work for me which is available to buy here in the UK?

Thanks! Here’s an added link to the device I’m considering … ore&sr=1-1

It would be helpful to others if you could provide a link directly to the device in question.