A versatile hoop for exercise that can engage all muscle groups Outer diameter: 32.5 cm Versatile hoop for Pilates Laubr Sport. Engage all muscle groups during exercise. EXERCISE WITH JOY! more effective exercise, required strength of various muscle groups, very comfortable handles covered with NBR foam, light and durable construction, Material: Acrylic Ring, non-slip, Inner diameter: 30 cm, Outer diameter: 32.5 cm