Here's a sheath I made for myself. It is carrying a knife Todd Butler made for me.
It is made of 4-5 ounce cowhide, dyed in my "finegaroon" dye. As in faux-vinegaroon. It is actually Fiebing's Pro Dye "Show Brown", but gives that deep black-brown shade. The top band is "Saddle Tan".
The ball-stud is to stop the knife from falling through if it is stuck in a waistband or belt. It can also be used with a frog, or with a loop sewn on the back of a hunting pouch.
I found a new source for linen thread, and love it. This is 4-ply.
I added a belt loop on the reverse. It has a welt to protect the belt loop's stitching. The sheath body also has a welt to protect the stitching.
Boots? I love the Colonial riding boot look, so I went for a variation of that in my color scheme. My thinking is that a wealthy customer may have wanted a bespoke sheath that matched his boots. That's my story and I am sticking to it. :-)
Pistols? I hear my gunmaker friends say, "I dislike making pistols as compared to rifles. They are hard to work with because they are so small, and no one wants to pay the money for a pistol that involves just as much work as a rifle." Well, that's the same case with a sheath. Lots of fussiness, time, and no one wants to pay for a sheath. Bags are, to a degree, relatively easier.
God Bless, Marc