Umm, looking at it I’d guess 7 or 8mm width on the metal part and the tube is about 6mm. It’s about 13cm long, we’d cut it down I guess before using it, that seems LOOOONG. I don’t want it to work as a catheter…
The base ring size was 45mm and is a very good fit. We had had previous cages that had similar ring sizes. 40mm is tight but useable, 45mm is comfy. 50mm would be too big for hubby I think.
There are measuring instructions on their site but don’t forget the fact that one of the HUGE advantages of buying from Toys4naughtyboys is they have a 30 day return so if it’s not right, just switch it! And unlike buying from China, you won’t have two months to wait…
But also note you can buy spare rings for lots of the cages from them for under £10, so you may want to get a small and medium just because some days you’ll fancy one and other times another.