I would advise doing some more research before getting to work, because I had to spend more time figuring out the measurements and size after I was already set to just start building! I ended up measuring 61" wide by 60" tall (it stands on the floor behind the bed and is not wall mounted, although you could wall mount it and save money by making it shorter). Materials I used were: two large heavy duty cardboard pieces I got for free after a kids camp at church, egg-carton foam I took from my hubby's drum cage in the garage (I asked nicely:) which he was using for sound muffling but I decided he'd be ok without it.. (I think he got it for free from a friend), one of our old sheets (also free, wedding gift but don't fit our bed anymore), duct tape (already had), needle & thread and staples & st
apler (also already had), and buttons which were $10 from the craft store.
Here is how I did it in picture form, but check out one of the above tutorials if you want really good steps for making one yourself!!!
And here is the final product!!!