Oriental cockroaches are the largest of the common cockroaches, measuring 1 to 1.5 inches long. They are black or dark brown and have shiny, dark-colored bodies. They are most easily identified by their large size and their smooth, dark head.
The best way to get rid of oriental cockroaches is to eliminate their hiding places by getting rid of any clutter and cleaning up any spills and moisture. You can also use commercial cockroach bait or spray. If you have a severe infestation, you may need to call a professional exterminator.