Scandie sheeths are a very different game compared to "normal" sheeths.
I'm working on my 2nd at the moment. (actualy the 4th, but the first two I turned down)
There are books on the subject. Bo Bergman wrote one but I'm not impressed with it.
I also have one by Thomas Löfgren, but to my knolledge it only exists in Swedish and German.
It's a good book but you have to be able to read what he does, just the pic's arn't enough.
A right handed man will wear his puukko on his left hip, edge facing forewards.
I'm doing mine without wooden inlays. Just leather. 2,5mm and I sow them with 0,5mm brown "woven" fishing line.
Using double sided tape put two layers of thick cardboard on the outside facing side of the blade and one on the other. Next make a smooth transition towards the handle with putty/play doght/clay.
You wrap the knife in thin house hold plastic, two or three layers. Then make a paper template.
You have to make it exact.
Measure the handle thickness on three or four places with a paper measuring tape! The thickness of an other measuring tape will make a difference!
The next formula worked for me:
Handle thickness+1mm*+1mm*+leather thickness(=2,5mm)
Ajust your template or make a 2nd one according to the formula above.
Around the blade you can afford a mm extra as the leather won't touch the steel.
Towards the bottom I gave app 6mm extra. Make the leather a bit thinner here.
Put the template on the smooth side of the leather and mark it with a thin pencil line.
Cut straight down.
After cutting out turn it around, having the rough, flesh side up.
Now mark a line 1mm inwards from the edge. (thus the * +1mm times two)
I used my grinder to cut the leather at an angle, not taking any from the smooth side, but to the marked line.
So the with of the flesh side is 2mm narrower as the smooth side.
Now draw a very fine pencil line on the smooth side again, where you will stich, 1,5mm from the edge.
Wet the leather, let it soak in hand warm water.
Take a markring wheel, I like 4mm, mark where you will stich, on one side, on the pencil line, starting from the bottom.
Count the marks and mark the same amount on the other side.
Take an awl and carefully puncture holes. Have a good look at the picture I'll place here, how to puncture the holes.
I used a straight one to cut the first 1/4mm then a bend one to make the final cut.
Sow with the saddler stitch. I take 10x the lenght of one of the sides to give more then enough.
Finishing at the top go back a stitch pulling both ends to the inside of the sheets and tie them together.
Insert the knife, ajust the seam how you want it and let it dry.
Only cut the top after it has dried.
You can thin the leather from the inside at the top to make it look better.
Rewet, re-insert knife and let it dry again.
