Abstract: A collar stay capable of being retrofitted to any collared shirt in order to maintain a flat and wrinkle-free corner of the collar. The present collar stay can be comprised of rigid, planar material such as craft felt or plastic. This rigid, planar material can comprise an adhesive layer on one side, which can be used to connect the collar stay to the collar. The present collar stays are typically connected to the underside of the collar, however, in an alternative embodiment, the collar stays can have ornamentation printed on one side and can be worn on the upper side of the collar so as to better display the ornamentation.