18" x 18" x 3" (Square). 20 lbs. Base with 2 3/8" diameter Post ENVIROform Parking Lot Sign Units are ideal for parking lots, crosswalks, guard shacks, schools, industrial and construction sites, or anywhere portable outdoor signs are needed. The 60 lb. base is made from 100% recycled rubber and will not chip, crack or corrode. Each 60 lb. unit is flexible to withstand high winds and bad weather, as well as heavy traffic areas. Lighter weight models are ideal for indoor or light temporary use. The portable base makes lot maintenance and snow removal tasks easy. The sign base unit may be used in both indoor and outdoor settings. Bases clean up like new with whitewall tire cleaner (no wiping). The use of just one economical unit will provide enhanced parking lot safety and provide you with the capability of less liability/damage in vehicle incidents. One 60-pound sign base prevents more than eight tires from entering Americas landfills. - Signs not included.