I think your black line looks a little too ` straight`....... I`d suggest more of a curve as shown..excuse my shaky line--I`m using a laptop touch-pad--- it may look a bit unnatural if you come ` down` too far.... best thing is to ` follow` the curve of your growing hair, out we`ll say, a distance of 25mm. in the same contour.....make your template, sit it on, and post a pic and you can get opinions on if/where to ` tweak` it. You can easily add more material or trim it off a bit if needs be. Hope that helps.