That sheath is not going to effectively retain that blade in a sideways orientation over time. Leather is organic, it continues to stretch and move and change with time and use and water and sweat. Good luck when you go to get in a car and the knife falls out and you put it through your car seat or butt. Or if you actually do anything outdoors, you will lose the knife.
(What is it with all of these people designing products in CAD and sending them off to a 3rd party manufacturer while none of them having real world knowledge or sense of how things actually work? )
Look at the positive retention of the Esee Izula II (which is eerily similar, yet superior in every way with a lifetime warranty from a solid company at a much cheaper price) for a way to do this correctly. Also, leather holsters unless very well designed will keep moisture on the blade for a long time when they get wet, leading to corrosion and affecting the edge.