What size is the chevy hhr steering wheel ?

The size of the Chevrolet HHR's steering wheel varies slightly between model years and configurations. It falls in a range of 14-1/2 inches to 15-1/2 inches in diameter, with a grip circumference of 3-5/8 inches to 3-7/8 inches. Without more details, it's impossible to give You more specific information. If You're asking because You're planning to buy a steering wheel cover, You'd do best to purchase a model that's designed with Your model year HHR in mind. Trust me, You don't want something that's even a hair too big -- the beSTSteering wheel covers are going to fit like a second skin. Something too small won't work, and something too big won't feELRight. It's best to search for Your preferred design by model year and configuration.