Thanks everyone for your responses.
I had thought about hanging one from the roof but I like the ones that are nice and tight so I know bub cant pull it in or the cats climb. I know I'm probley over thinking things but I worry!
Thanks eight years, I get what you mean about it slightly fitting that's an option I will keep in mind and I will also on ebay and gum tree.
The other option I have found is to buy a grotime cot as they seem a little smaller. So much research to do!!!
Thanks again everyone!