It depends on where you get it and the width
There is also Shantung Fabric that have a similar texture that comes in cotton, silk and man made fibers.
Also her fabric looks like things where sew into if for the metallic gem finish.
The basic sizing of her dress is the same as Merida's but she has long bell sleeve to hers thatn don't have much in the way of shape or form.
Bell sleeves you can draft on our own so long as you take into account the arm hole.
Also she have double layer sleeves (second layer is a smooth dark green fabric). Also she has a dark green under dress (simple dress pattern I linked) that peck out at the collar, wrist and the exposed skirt with texture.