Alas, they only seem to have sizes medium and x-small left (neither of which am I)!
I also fell in love with this (pricier and which I currently cannot afford) version from Steven Alan:
The two brands also have tons of other lovely dresses if you're interested (I actually love just about everything on both of their online stores). Also, if you're looking for a less pricey version to get on this trend this winter, a simple Google search for "plaid shirt dresses" will suffice. Trust me :)
**Madewell is also having a sale at the moment - 30% off $200 or more and 20% off $100 or more with the checkout code GOFORIT. Enjoy!**