Your Breathing Room Back: Opt for premium comfort and expand your dress shirt collars by ½ neck size to make them more comfortable to wear and save money from replacing too tight neck shirts. Top Quality: Johnson & Smith collar extenders make your durable buddy for lifelong use. Made from environmentally friendly, super-durable zinc alloy. Conviently Discreet: Just 10mm (3/8”) in diameter, those neck extenders are your secret ally for peerless comfort and a unique sense of freedom in use! Easy to Use: Attached in less than 5 seconds. No sewing is required to attach our metal shirt collar extenders to your shirt! Simply loop one around your shirt button or daisy chain a pair of them together for even more space. Preimium Quality: At Johnson & Smith we take pride in the quality and craftsmanship of our products and we back these extenders with great customer service.