We also have them and they love my garden. My slippers love to step on them as well.
Here they can be much bigger then on that pic. I have seen ones where the house was almost 1 feet long (25 cm). If i see one then i kill it but they are everywhere in my neighbourhood, especially in the wet season.
I put plastic chickenwire all around my potted plants and so far it worked.
It also works to use coppertape, they won't crawl over that. I am still looking for solid copper rings to put around the stems of my plants. They hate copper, also ants hate it. Just find a sheet of copper and cut it into strips. Bend the strips into rings and put them around the stems.
You can also buy those rings or tape online.