The ring is made of durable fibreglass with a rubber tube outer layer that will never bend or break. The fitness ring always retains its shape and turns back into a round shape even after the most strenuous exercise. Size diameter: 38cm. Suitable for a wide range of fitness activities - Pilates Circle can be used to burn belly fat and build upper arm, inner and outer thigh, abdominal and back muscles. Increases flexibility, mobility and endurance. Ideal for general exercise and Pilates. No heavy training required. Our fitness rings are lightweight, powerful and moderately flexible, perfect for your full body workout. Whether you are a beginner or advanced, the Magic Exercise Circle is suitable for standing, sitting and lying down only. The Magic Pilates Circle is perfect as a mobile training device in your office, studio or travel bag. Train anywhere, anytime. Product Description: 100% brand new, very durable and practicalIdeal for people who want to stay fit and healthyWhen you want to exercise at home you can try Pilates! Product Features: Size: 38*38cmMaterial: rubber and fibreglass. Features: high quality, durable, stylish Type: pilates ring Tips:1.Due to manual measurement, different measurement methods and tools, the size may be slightly different. 2.Due to different light, angle and monitor, the picture may not reflect the actual colour of the product.