Following are directions for attaching a stand collar. This method can be used on a shirt collar as well as a coat collar.
First, sew the collar and collar facing together along 3 edges. Turn and press. Do not turn the raw edges under. The top photo above is the collar, the bottom photo is the collar facing, cut from tie silk.
Pin the collar to the neck opening at the center back and work toward the center front. Continue pinning past the front opening, so you pin the collar facing to the jacket facing for almost the entire length of the jacket facing. Begin stitching on the facing, stitch the collar to the jacket edge, and end with the opposite facing.