A collar stay, collar stick, collar bone (British English), collar tab (British English), collar stiffener, or collar stiff is a shirt accessory consisting of a smooth strip of rigid material, rounded at one end and pointed at the other, inserted into specially made pockets on the underside of a shirt collar to stabilize the collar's points.
A collar stay, collar stick, collar bone (British English), collar tab (British English), collar stiffener, or collar stiff is a shirt accessory made of a smooth strip of rigid material, rounded at one end and pointed at the other, inserted into specially designed pockets on the underside of a shirt collar to support the collar's points.