Awesome work! Like the shape and the way the handle matches the design of the blade sweep somehow..
My dad had the same dilemma many moons ago when it came to a sheath. He decided on wood, and let me tell you what! It turned out so neat! He played out the shape of the blade on to a piece of wood that he had split in half. Then carefully carved out inside of the lines for half the blade thickness on each piece. Essentially forming a clamshell around the blade. One half of the clamshell extended up on the handle, he fit and shaped the area on the sheath to the handle shape. The end result was a very neat little sheath that when you slid the knife in, there was a just barely audible snick as it slid home. A simple leather lace attached it to the belt through a hole in the wood..anyhow there are many ways.