Varies, though usually no larger than 1-1/2 inches in length.
Generally black or brown.
Crickets generally live and breed outdoors and invade buildings searching for food, moisture, or shelter. The adults are attracted to bright lights on buildings and may fly to homes and other buildings by the dozens or even hundreds (in mid- to late summer). Once near the building, crickets will crawl through any crack or hole that allows them access inside. These insects have been known to feed on and damage clothing, usually items that are soiled and awaiting laundering. Camel crickets do live and breed indoors, usually in a crawl space, cellar or basement. They occasionally wander up into the living areas of the home where their quick jumping ability can startle the unwary person. Camel crickets may also invade homes from wood piles and similar areas outside.
The natural habitat of crickets is a field or wooded area. Near buildings, they will be found living among tall weeds and heavy vegetation (e.g., ivy), under boards, stones and other items, and in piles of lumber, firewood, or debris.
The best way to limit crickets is to eliminate as much potential harborage as possible outside the building. The following tips should prove helpful: