Oventure Silicone Key RingsThe silicOne Big O Key Ring is 3. 75 inches in diameter and fits over your wrist, helping even the most active women stay hands free. Top quality silicOne comes in a collection of bold, bright, stylish hues, are water repellent and non toxic. They are an excellent accessory for beach, pool and fitness focused women. Our patent pending design and sturdy signature clasp won't break a sweat and easily hooks up with all our O ssential accessories.