18PCS SHIRT COLLAR BUTTON EXTENDER: Perfect solution for tight uncomfortable shirt collar. Including 18pcs button extender with 5 style are suitable for various shirt button, meeting your more needs.PREMIUM DURABILITY: Made of premium plastic, lightweight and durable, which adds an extra 1/2''-1 inch of comfortable space to the neckline area of your formal shirt. The button diameter is abour 1cm, suitable for most shirt button eyelet.EASY TO USE: Easy collar button extender, just put the buckle of our collar extension button around the original collar button, and the extend collar button is settled and few second extra time took to put this collar extender on to make your comfortble all day.BLEND INTO SHIRT PERFECTLY: Including 5 different style and design collar button extender, you can choose prefer and proper color and style collar extender to fit your shirt, invisible design also works perfect various Windsor necktie knot, perfectly blending into various shirt.MORE USAGE: Also, it's perfect for a fine-fitting for various button, includin cuff button, pants button, dress with button closure, using button extender to make your feel more comfortable on shirt.