I made a quick one just to protect it from scratches, but I am changing my design to included a handle. I actually broke my Kindle trying to prevent it from falling when I tripped. Grabbing it, I squeezed the screen and it didn't work right after that. SO, I want a handle so that I'm not holding it that way.
All I did was make a padded rectangle double the size of the Kindle using leftover batting. I folded one side up until it securely held the Kindle. Then pinned, sewed on both sides. Then top stitched all around.