Comfortable: Made from non-toxic 100% medical grade silicone. Approximate Size: 20cm circumference, 5.5cm internal diameter, 1cm wide and 2mm thick. Accessories: Get a pair of reversible relationship wristbands. Quantity: Or upgrade to receive four, six, eight or 10! Reversible design: Show off your relationship status, whether you're single or coupled up! Reversible Relationship Wristband | Black | Living Social