Abstract: An adjustable shirt collar has an integral tab extension on the stand element of the collar. The extension has a length to it to span the distance across the necktie space on the front of the shirt from underneath one end of the shirt collar element to a termination area underneath the other end of the collar element. An adjustable fastening apparatus is secured to the collar stand in the termination area to be connected to a connector element on the extension to permit the adjustment position to be effected. The tab extension is curved slightly upwardly above the upper edge of the stand element and the collar element to permit the collar element, the stand element and the tab extension to adjust to the curvature of the wearers neck and to dwell in substantially a common plane around the wearers neck.