This solution has been working for me for quite a while now...
+1 :thumbup:
I have two sizes
The smaller is in a softer leather and easily holds a 3 3/4" knife
The larger is in a stiffer leather and easily holds a 4 1/4" trapper
Both my versions are sewn with a middle seem
The advantage of the middle seem is you can have the knife upright and at the same time choose which side of your back pocket you want the knife to rest.
So when I carry the knife in my right back pocket, the knife is on the right side of the pouch and is on the further right of the back pocket so I do not sit on the knife when I am sitting down.