Details...

• Character: Jessica Day
• Actor: Zooey Deschanel
• Show: New Girl
• Episode: 2x01 "Re-launch"
• Brand Product : Vintage Costume
• Buy:

  The Golden Closet – $1.500

• Credit: The Golden Closet
• Description: The costume seen on Jessica, thanks to Golden Closet, is labelled as vintage. No brand. Although I have actually found some old pictures of actor Teresa Palmer, so maybe there is an actual brand and it's not just vintage. I did some research with no luck unfortunately.