These are a breeze to make. The blog, Empty House, suggests cutting off about 1 1/2 inches across the top but I found I had to cut off just over 3 inches to make it work. The top then tucks into the flap on the bottom.
In reading the comments someone had suggested taping down the "backside," because the DVD/CD will only fit one way. I used two small pieces of tape and it worked great.
You can colour, stamp, or print and glue a label on them. Great idea! Thanks Tipnut.com and Empty House!