A wetted leather build along. (at least my method)
I started with 6 Oz. leather for the face.
in order not to trap the finger guard (and the knife) in the sheath. I had to build up the area behind the guard. I used foam and tape.
I soaked the leather front and back.
then started massaging the leather over the knife.
It's kind of like working with a piece of balogna. The white thing a bone folder/creaser
When finished. I set it in the sun to dry.
When it dried and while I still had it on the form. I punched the lacing holes.
Then I cut it out and used it as a template to make the back of the sheath. For this I used 8 Oz. leather