Folder sheaths, I use 6/7 oz for best forming and secure fitup and get my leather and materials from
Weaver Leather very good people and will help you out.
Depends on the sheath style you want to make, I use the bubble wrapping material, small bubbles, and lay the knife in that and wrap it around the knife to make a template to use to cut the leather out, the bubble wrap being about the thickness of the leather and thereby not losing any length as you wrap around. I also wet form the leather which also stretches the leather and removes some of the give so it retains it's shape for a long time. I wrap the knife in plastic food wrap to prevent moisture from transferring onto the knife, then while the leather is drying, I'll put the knife back beneath the leather and form around the knife, repeatedly, using a Bone folder tool, a stick of nylon tool.
The best glue I've found is Barge Cement, excellent stuff, Tip:Make sure you rough up the surface of the leather before applying the glue so it has a chance to sink in to create a strong bond.
Also Fiebings Professional Leather dye with Oil is also TOPS in the field, when you apply it, let it set and allow it to spread evenly through the leather, don't rush it!
For a finish I use the Atom wax also from Fiebings, rub it on and then brush it to a nice gloss with a shoe brush.
Sewing, you can use the two needle method, me, I use the Awl n Awl, basically regular sewing, bring thread through the leather, and half the thread on the other side, then as you put the needle through the hole and pull back slightly, slip the one side through the loop and pull it tightly down into the leather, works well. I use a four prong tool to space my holes out and then a sharpend small screw driver that I pound through the leather to make sewing easier. If you drill...it looks drilled...when you reach the end of the sewing, sew back over a couple of holes to lock the thread into the sheath. No need to try to tie a knot.
Good luck, it's fun to do but is very time consuming!
G2
Nice looking folders you have there!
AND Sandy...your email isn't working?