*Update* As Gypsyangel4i pointed out, the left lapel is shorter than the right. That is viewer left, not Loki's left.
I fell in love with this coat the moment I saw it, I'm not even going to wear it as a costume, but every day.
After studying dozens of photos I feel this is as accurate as possible.
So here's some advice and explanations:
I don't recommend this for new cosplayers, jackets are one of the more difficult things to make in sewing if you're inexperienced.
But if you do have experience it doesn't hold too many suprises for you. Except for the sleeves, I've yet to figure out just how the pattern is going to work there.
Having not even drafted the pattern I can't tell you exact meterage for the fabric yet. But from previous experience you're looking at about 5 to 7 metres of both green and black fabrics depending on your height and the width of the fabric.
The green fabric is velvet (non-panne), this is used on the upper sleeves, the lining, the small strip laced through the shoulders and the cuffs (they're actually wrapped pieces of fabric in the movie, but you can insert them as permanent features as I will).
The rest is black leather, you could use vinyl as it is cheaper, but you get what you pay for and it wont last as long or look as good.
It is difficult to find leather in this kind of quantity, but the coat is broken down into smaller panels if you look closely. The 'skirt' is made of six seperate panels that begin at the hips.
The top has, for a lack of a better term 'princess seams', the seams that run between the center front and side seams.
And the sleeves are made of strips which would concievably use less fabric than a normal sleeve.
Most of the edges are finished off with a zipper-like trim, detailed here with lots of little lines. I just plan on using actual metal zippers. Unless you are able to find a trim just like that one.
There are some panels at the back that are drawn with two lines very close to each other, that's top stitching which makes it sit better.
The bronze/gold strips on the skirts are just ribbon of some sort. You'd probably only need about two or three metres.
The similarly coloured strips on the sleeves seem to be strips of leather laid over a fabric with the zipper look to it. You can cut a corner here and just use the ribbon from the skirts.
And finally the shoulder armour is seperate, if you look closely in photos there are little opening for it to be pulled through.
I would recommend a heavy leather with a texture on it, it seems to be finished off on the inside with matte black lining and gold rivetts.