Four matching chairs solve a different problem from two, because a row of seating has to line up and stay lined up. The sled base is what makes that work here: each chair rests on two continuous rails rather than four separate feet, so the chairs sit at a consistent height, slide rather than catch when nudged into line, and spread their load along the rail instead of pressing four points into a floor. Non-slip foot pads under those rails hold each chair where it is placed and protect the surface underneath. Screw connections through the base are tightened for stability, and the reinforced metal frame is rated to 330 lbs per chair, so any adult can sit down without hesitation. The seat is generously cut at 18.5 by 17 by 2.5 in and set 18 in from the floor, with resilient sponge filling in both the seat and the back so the cushioning does not pack flat under repeated occasional use. A 14 in backrest is contoured for support, and padded armrests give the arms somewhere to rest rather than a bare frame edge. Covering is waterproof PVC leather, skin-friendly in direct contact and wipeable, which is what a shared chair needs when a drink goes over. Each chair measures 22 by 22.5 by 31 in, the four weigh 66 lbs together, and they suit meeting rooms, reception areas and home offices. Assembly is needed.