It's the same as securing your house - your deadlocks and chains and security screens won't stop somebody with a crowbar or an angle grinder, but they'll do the job to keep out any/many/most opportunistic thief looking for an easy "in".
Different lengths, depending on what you want to use them for. I think the longest is 240 cm - about 7 feet. If you want a little low fence, you can get the shorter ones.
In that linked photo, the "common" ones in town are the third from the left. You can thread horizontal wire through those holes, and attach the mesh to that wire. It's not much use to the OP if you don't have them over there
I made my yard out of aviary mesh and star pickets. I ran wire through the star pickets (horizontally) and attached the wire mesh with wire to the horizontal wire. It can be relatively easily be taken down and moved. (I just folded the aviary mesh over on the bottom to make a "self-apron"...