There are tons of different mesh options out there. I used the same size of mesh for both my dwarf and Syrian.
Here's a tutorial posted by one of the users here.
Hamster "Bin Cage" Tutorial
Instead of nuts and bolts I used cable ties myself because it was easier and cheaper.
__________________
a•mel•io•rate, a•mel•io•rat•ed, a•mel•io•rat•ing
to make or become better, more bearable, or more satisfactory; improve; meliorate.