This purchase is for two sliders, sold as a pair, with free shipping! The diameter of each slider is 7 inches. Strengthen your body anywhere with these exercise sliders. Light weight and easy for transport. Designed to move smoothly on any surface for the ultimate core strengthening workout. Strengthen and tone your full body including core, arms and legs with movements like lunges, bridges, planks. Whether you are new to fitness or an experienced athlete, these sliders can help you build strength and flexibility. Ships separately from kettlebells. If ordered with kettlebells, this might arrive separately and will have separate tracking.