Belle is a slouchy, sheer knit. She is actually a rectangle with waist and neck openings on opposite sides which causes the garment to bias when worn. This effect is deceptively easy to knit.
The sleeves and body are knitted as one on US 9 circular needles and finished off with a couple 3-needle bind-offs and ribbing.
Use Isager Strik Alpaca 1 with Isager Strik Viscolin, or habu linen with habu tsumugi cotton or Shibui Knits Linen.