Chastity and orgasm denial discussion

Hi, Looking to buy my first chastity device and have been pointed at the Attica sold by UberKinky. Looks good - not sure whether I would prefer solid rings but the thing that has me hesitating is the internal diameter of the cage it is 40mm. I’m a grower so the short length of the Attica is good but just not sure whether it is too wide - seems a lot wider than other devices - what do you think. Cheers, Nigel