It works. It's bigger than needed, but, its intention isn't for looks and it does exactly what it describes. I suggest getting a color that's not white. If you're purchasing for bug reasons, it will be easier to spot the eggs.
I got the black covers and they are a very big but after some fixing and tucking I got them to look half easy decent. But it really works!!! They are expensive but worth every penny. Since I’ve put them on I haven’t seen a bug since. I used to spray around the couches and lift it up to make sure they weren’t hiding under and I no long do that anymore. Before I put them on I sprayed the couches too to bottom and then the walls that it sat on. And then encased the couches. I tried so hard to get rid of them but no luck. This is even good for spills. My kids would sometimes fall asleep on the couch and would have accidents so this keeps liquids off of the couch and makes it easier to clean without leaving odors or stains