This is very simple actually - there is no stand and it is a one piece collar. It is called a half-roll collar and the way to make it I got from this fabulous website vintagesewing.info . Click on the image to enlarge it.
Explanation - a is the width of the collar that you choose for your design, b is the height of the stand you want to get in the back. You can basically trace this collar if you just put your pattern pieces on a flat surface and draw over them. The angle in the front is again free to be designed.