It's not perfect by any means (but is also not nearly as wrinkled and crooked as this photo makes it seem), but I still think my friend will love it!
For the gray border, I used this random piece of fabric from my stash:
I think I picked it up for $1 or so at a garage sale, and there were probably 3 yards of it...but I didn't realize until I unrolled it that it's a tube of fabric! So strange, I've never seen anything like it.
I still need to figure out what material to use for the back. My friend has been very specific about the color that she wants, but I don't think she realizes how expensive fabric can be, and I'm trying to use up my stash, so...I might just pick up some dye from JoAnn and have a go at fabric dyeing for the first time! I've been wanting to try it for a while. Does anyone have any tips to offer?