This collar support enhances and maintains the shape of a perfect shirt collar by providing support that prevents shirt collar drooping, sagging. No sewing or alterations required. Simply flip collar up, place collar support in position, and flip collar back down for an instant perfect collar. Features -Color:Transparent -Material:PET -Size:7.20X1.00X0.10cm/2.83X0.39X0.04in -Made of well-selected PET material, durable and can be used repeatedly. -Lightweight, Durable and Flexible material designed to provide a natural look that hides in the shirt collar while naturally moving and flexing with and neck movements. -Our collar stays are engineered with smooth edges, so they won't rip or tear your shirts. -Both ends are nicely processed, so as to avoid puncturing the pointed end of your shirt. -Our collar supports come with your shirts. They will keep your collars stiff all day long. Package list: 300 x collar supports