I started it almost a year ago as an oddball blanket from all the acrylic odds and ends my grandma gave me. At some point i just couldn't do it anymore, so i bought a simple pillow in a fabric store, knitted some more and then folded the thing, seamed, put the zipper and voila.
It's about 80cm x 80cm, which is about 30"x30". I didn't bother blocking it. BUT there's a big problem - my dog really doesn't understand what it's for. She's a big dog, about 50 pounds, but she does look funny and small in the picture: