There are 4,000 types of cockroaches on Earth, with 40 of them being found right here in the United States. Cockroaches are filthy pests known for spreading diseases and even provoking asthma or allergies. Knowing the size of a cockroach can help you identify what species it is. Do you know how big a cockroach can get? See below for the most common species of household cockroaches and their sizes.
Brownbanded cockroaches can be half an inch long, or the size of a large blueberry.
Oriental cockroaches are about an inch long, or the width of a Cheez-It.
American cockroaches can grow to be 1.5-2 inches long, or about the size of a cucumber slice.
Giant burrowing cockroaches are around 3.5 inches long, or the size of an avocado. They sure do live up to their name!
Michigan State University
Western Exterminator Company
The National Pest Management Association