KIT includes two slick collars and 4 collar stays. The Slick Collar Keeps Your Shirt Collar Standing so it doesn't fold under the weight of your jacke Adjust the Slick Collar to fit your shirt collar siz You've got the perfectly straight collar that will not fold or collapse The Slick Collar is adjustable to fit shirt collar sizes 14.5"(Small) to 20" (3XL) The tips can be trimmed for shorter or spread shirt collars. The Slick Collar can also be bent and slightly curved. ZB2-43