Sowbugs and pillbugs are typically between ¼ to ½ inches in length.
Sowbugs vary slightly in color from dark to slate gray with oval convex upper bodies and concave lower bodies.
Sowbugs have seven pairs of legs and two pairs of antennae (one visible and one difficult to see).
Sowbugs and pillbugs are similar in appearance, however, sowbugs have two tail-like appendages projecting from the rear and pillbugs do not have posterior appendages.
Sowbugs also cannot roll up like pillbugs when they are disturbed.