Pattern characteristics: deep V neckline, gathered skirt and statement sleeves.
To draft the pattern, start from a basic block with darts.
Fabric: You can sew it in any light to medium weight fabric with crisp or stiff hand, so that gathers will stand more. It can be stiff cotton, gabardine, taffeta, silk twill, organza with underlining...I would choose silk faille or taffeta, as they have a stiffer hand - this means they would hold the volume by themselves, without adding any inner structure to sleeves. If you choose a softer fabric, consider adding an organza layer as sleeve interlining to support the volume ;)
You can learn our method for drafting perfectly made to measure basic blocks (contoured ones, and the ones with wearing ease) and for fitting them in our basic blocks course/module 1. You will learn in depth also how to manipulate darts, add volumes and a lot of pattern transformations that will take your pattern making skills to a higher level.