FiberMarker 4.5-Inchx3-Inch Red Round Double-Side Reflectors for 1/4-Inch Diameter Driveway Markers (24pack) Driveway markers dimension:24-Pack, 3-Inch red round reflector, height with rim 4.5-Inch For 1/4-Inch diameter driveway markers,not included the poles Safety signs - Clearly mark the edge of driveways, parking lots and streets at night, bright reflection as it illuminates from a 360 degree point of view when the headlights hit markers Property markers - Keep cars and trucks off your grass, and other areas of your property, such as mailbox, curb and fire hydrant. In winter, keeps your yard from being torn up by snow plow