Dudley lives in a Rydon Mill cage - I could not get a mini Duna when I needed to get one quickly for him as he was found on a bench so spent his first 2 nights in a big curver box until I got to the pet shop and grabbed a cage.
Dudley likes this cage but if I was getting a new cage I'd go for one a bit bigger so I could get more toys in the extra space.
I do have a zoozone in the garage I use to use as a car travel cage for my ill guinea, keeping that for a syrian but had not thought of it for a Chinese hammy, good idea that