Leandra Medine of The Man Repeller, before A Show, Lincoln Centre, NYC, February 2015. 
Super wide. I don't think you can go much wider than this without the trousers becoming unmanageable and creating mobility issues! Such a gorgeous emerald green colour...really fresh with the white jacket,
Recreate Leandra's look (kind of):
Rosie Assoulin wide leg silk trousers, Rosie Assoulin drawstring pants, Zimmermann Anais print pants, Alice + Olivia wide leg flutter pants, ASOS Premium wide leg pants with side panel, Proenza Schouler printed wide leg pants, Designers Remix Rumi pants, Topshop cropped palazzo pants, Milly wide leg pants, Tome cotton-blend wide leg pants, or Rosie Assoulin wide leg black and pink trousers