When the leather is bent around the gun, I determine which areas and how much of the holster is going to be covered with decorative stamping. The back of the holster needs not be decorated with stampings, and would serve no purpose. The place (outer edges of the pattern), where I used the stitching spacer serves to demark the location for the stamping where it was used, but for the area where the leather goes around behind and does not have a stop indicator to keep things uniform, I "draw" a groove with a straight edge and a ball-end scriber from Tandy.
I have enhanced the drawn groove via paint program to make it more visible in the photo.
My tastes run conservative, so a half-sunburst border and basket-weave stampings are used. The "Cowboy Floral", stampings and carvings are much too gaudy (and feminine), for my conservative tastes.
Here are the two tools I use for stamping:
