Orienta-beauty Adjustable Children Gym Rings With Buckle Made of solid (not hollow) PP Plastic and adjustable high density polypropylene webbing Comfortable teardrop shape specifically sized for a child's grip Antiskid and sweat absorption with a soft rubber coating You need twine the webbing yourself webbing size:110cm(Length)2.5cm(Wide)/43.3"(L)0.98"(W)(can hold up to 200kg)