I woke up super later yesterday, at about 3:00 in the afternoon, and just got down and made a pillow cover. I didn't do any real measurements but somehow it fit my floor pillows PERFECT!! So here is one and I am still working on the other.
The actual case is made of a red bed sheet I have that I never used and the circle & robot/monster are made with old t-shirt material. THe sewing isn't all that great but I'm practicing:P
I did another one: