Andrex do them as do others as said. I doubt there's much difference in size though. Whatever you do don't flush them down the loo, they are a massive source of drain and sea pollution.
The andrex ones are just for after the loo and too small. They do feel fresher though. I think Jj wanted something suitable for someone who perhaps couldn't always have a normal wash.
Whatever kind you buy, please dispose of them in the bin and not down the toilet. They cause a lot of problems with our sewage system as do cotton buds etc.