Abstract: A stay is provided for a shirt collar having transverse tubes formed integrally at respective ends of the collar. The stay comprises an elongate stiffener body and hook means for engaging fabric material of the shirt collar as the stiffener body is slidably inserted into a respective transverse tube of the collar. The hook means resists sliding movement of the stiffener body relative to the transverse tube of the shirt collar in a reverse direction after insertion to ensure that the stays do not fall out of the tubes as the collars are handled in the interim before assembly onto a finished garment. The hook means are particularly useful for resisting sliding movement between the stays and the knitted tubes of a knitted collar because the hook means readily engages the chained loops of threaded material forming the tubes in knitted collars.