Lots of questions on this recently.
Firstly lucky you!
So, if you want a plastic one then the same company who make the CB-6000s I’ve just recommended also make ‘The Curve’ which is much bigger.

Don’t forget that a good silicone lube will help slide him in it comfortably. Also read up on the stocking trick for getting his cock all the way to the end – slip the leg of a stocking through the tip, put his cock in it and pull it out from the end – voila!! (https://videopress.com/v/xyqoMprX)
Again, with the money worry, buy from Lovehoney and you get discrete returns and refunds for a whole year. Do not be shy about swapping it for something else if you need to!
If you’re looking for a metal cage then personally I love how this one looks:

The Lovehoney Prisoner Cock Cage
When hubby first mentioned cock cages to me it was the one I pictured as it had been on the show Californication, which was the first time I ever heard of them.
If he’s lucky enough to fit this, then I think they look fab!
Don’t miss the special offer discounts I posted earlier:
https://keephimcaged.tumblr.com/post/168434300070/i-wanted-to-ask-what-is-a-good-type-of-cage-to
Some of them expire tonight!
Jane xxx