ITEM NAME:Collar Extenders - Neck Extender / Wonder Button for 1/2 Size Expansion of S5Y4 Collar Extenders - Neck Extender / Wonder Button for 1/2 Size Expansion of S5Y4 Opt for premium comfort and expand your dress shirt collars by ? neck size to make them more comfortable to wear and save money from replacing too tight neck shirts. TOP QUALITY + FREE EXTENDER: collar extenders make your durable buddy for lifelong use. Made from environmentally friendly, super-durable Aluminum. CONVENIENTLY DISCREET: Just 10mm (3/8 inch) 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. Color: Silver Material: Aluminum Bottom diameter: 10mm Spring diameter: 1.9mm Package Contents: 6 x Collar Extenders Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.