JOVIVI 40pcs Metal Collar Stays for Mens Dress Shirt 4 Sizes w/Box 40 Pack high quality Metal collar stays. (all of varying lengths, but all in the same width and thickness) With 4 different sizes (2.2'", 2.5", 2.75", & 3.0") this set of stays will fit all shirt and collar sizes. Each collar stay has a beautiful polished finish Sturdy plastic box for easy access. Forget plastic collar stays, stainless steel is the way to go. These will never bend like plastic, keeping your collars looking good as new.