This is a hot to on creating a (somewhat) accurate viking costume.
Step 1: Planning makes perfect
Well the first stem in any sort of thing like this is to know what you plan on doing. so here are my plans.
Before we get any farther let me clear up one common misconception.
VIKING HELMETS DID NOT HAVE HORNS
Horns were not on viking helmets, horns would have gotten in the way. imagine this, every time you bring your sword over your head you knock off your helmet, sounds like a good idea to get rid of this problem doesn't it. Horned helmets came from Opera not history.
Step 2: Suppplies
Well this part is pretty obvious, but after you know what to make, you need things to make it out of.
I chose a tunic pattern that looked enough like what I drew, then i bought enough fabric according to the back of the pattern package for how much fabric i would need. If you are just making one then you will need much less than what i have here, this is materials for 4 costumes.
The fur and leather will be used to make leggings, bracers, and other trim.
Step 3: Laing out the pattern
All i can rely tell you here is that most patterns come with a diagram about how to lay the patten out, though it is not always the best way. I didn't use the plan included, because i was making 4 not the 1 they tell you how to layout.
Step 4: Cut is out
Pretty self explanatory, just cut it out. one quick thing, before you cut it out you need to know if the pattern has seam allowances or not. If it does, then cut it out on the edge, of it doesn't then cut it out withe the distance it tells you from the edge.
Step 5: Sew it
This is not a how to sew, so I'm not going over that, but i will say that the pattern you chose should have an instruction set, follow them, unless you now what you are doing and have plenty of experience.