As it is so large it is probably a pashmina. I have a lot of them and they are blanket sized so you can wrap them around you. I got mine from relatives in Pakistan but there are other versions available.
This looks like an Hermes cashmere shawl. Go over to Hermes and look at their "Ode to the Cashmere Shawl" thread. Definitely looks like one of those beauties.