Description: You can buy this to supplement your workouts. You can do your core / strengthening exercises at home with it. Come and have a try. Specifications: Type: Pilates Circles Material: PP, NBR Color: Blue, Purple, Pink, Green, Black, Grey (Optional) Diameter: Approx. 3cm / 1.18in Item Size: Approx. 37 * 3cm / 14.57 * 1.18in Package Size: Approx. 37 * 37 * 5cm / 14.57 * 14.57 * 1.97in Package Weight: Approx. 300g / 10.58oz Package List: 1 * Fitness Ring