IF YOU'RE IN THE SEATTLE AREA, I'M SELLING THIS FOR $100 BUCKS. seattle.craigslist.org/see/art…
Made out of mattress foam, fleece, sculpting wire for the ears (Got the inspiration from Adam Savage's Dr. Octopus costume from an episode of Tested) and lots of hot glue. The ears are made out of high-gauge sculpting wire, so the are flexible and you can bend them to shape (ie, if you want the ears to fold out 1/2 way up, they will stay that way).
Lightweight, but fairly large (roughly measures front to back ~22 inches, top to bottom ~13 inches, side to side at it's largest is around 10.5 inches and the ears are ~ 20 inches long) You can see out of the eyes, but you will find yourself turning your head a bit as they ARE on the sides. I was able to walk up stairs and us the computer at my office while wearing it and later that night walked a solid 20 blocks in the dark down a fairly busy sidewalk without tripping or running into people. Fair warning, I did get a slight headache from turning my eyes to the side for such a long period of time, but then again, it's not really something you want to wear at your desk all day anyways!
So how do you wear it? The "hood" is permanently attached and you tuck the fabric (an extra 8 inches or so to prevent it from popping out) down the back of a jacket. I have a pretty big head and am the model in this photo. I'm 5' 11" and I had no issues with it tipping off or sliding due to the foam inside being tight enough to stay put, but soft enough to no squeeze my head. The inside is also lined with cotton, t-shirt like material to make sure it's nice and soft.
The eyes are made out of canning jar lids, but just the threaded part. The rest is a light mesh (cost me 15 cents at a local hardware store) that lets me see out easily, but blocks others from seeing my actual eye behind it.