Features:1. These buttons are made of high quality alloy material, not easy to rust, reusable and durable.2. Advanced Button: The size of the button is only 10mm in diameter. Suitable for shirts, suits, skirts, trousers and other clothing.3. These extension buttons can make your shirts more comfortable to wear and save money on replacing shirts with tight necklines.4. Easy to use: Simply attach the stretch collar extender to the existing buttons on your shirt to quickly gain extra space, perfect for use with a tie.5. These collar extension buckles are very practical gifts for family members on special occasions such as Christmas, Thanksgiving, birthdays, etc. Notice:1.Actual color may be slightly different from the image due to different monitor and light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: AlloySize: 10mmincludes:6pcs x Collar Extenders