Nice lines on that knife. Sheath building is a necessary skill if you are making sharp knives, I use two categories of sheaths, those made from relatively thick leather with a welt to protect the stitches and those that use a liner, wood or rawhide, to encase the blade with a thinner leather cover.
the techniques are a bit different,
Tim Albert has done some nice articles in Muzzleloader magazine on the welted sheaths.