The coat as pictured seems to be 3/4 length but you can make it as long or short as you want.

The thin dark brown stripes are done in stockinette. The rest is reverse stockinette.

You will need:
7 (8) balls of super bulky rust/brown
6 (7) balls each of super bulky blue and light brown
3 balls of worsted brown (4 might be better as it is two strands together)
scissors
yarn needle