A 2.5" diameter post and small 5? diameter fixed base allows you to keep the floor clear and prevent tripping hazards while securely fastening stanchions flush to the floor. These versatile stanchions are designed to sustain daily use with built in belt braking technology to prevent belt damage with retraction. High quality belts extend to lengths of 7.5 feet, 9 feet, or 11 feet and come in a wide variety of colors and messaging.