Purchase the most popular sized collar stay used in menswear. "Power-On" your shirt collars with the only magnetic collar stays. These high-tech alloy stays are made with the same material found in aerospace engineering. Power Stays transform all of your dress and sportswear shirt collars into hidden-button-down collars. This will give you the unique ability to adjust your shirt collar where you want it. It's like gaining a whole new closet full of shirts!