In the area at the tip of the blade I used a divider to extend the pocket deeper into the sheath to allow extra space for further sanding. Hold the divider so the marking end points toward the tip end and follow the curve on the sharp side of the blade starting with the lead against the blade and ending with the pencil 3/16" out from the end. I then clamped the blade down on the boards with a dime in between to raise the sharp edge and marked them with my divider to make another line 1/4" out from the blade, at the end where the tip is, I free-handed the line around the extended portion. This line is where the blanks will be cut with the bandsaw. The space around is for gluing the pieces together later, it is good to make sure there is enough room for glue, but not too large to keep it from looking bulky. Nothing here is super critical except that the shape of the blade is correct, and the sheath will fit snugly when finished.