Chiara Ferragni of The Blonde Salad, before Derek Lam, NYC, September 2015.
Striped knit dress. 
Recreate Chiara's look (kind of):
Suno striped wool-blend knit dress, Topshop wide knitted dress, Sonia by Sonia Rykiel Multi striped sweater dress, ASOS Striped knit dress, or Topshop roll neck striped dress