Here's a super simple project, that, looking back would have looked super adorable with some bold printed fabric. I think I decided on the creme colored because I didn't want to take away from the button though...I'm a sucker for shiny.
I got this fabric for free from some brand new clothes someone was giving away and I've been saving the button for years. Cut a strip out of your fabric, thickness is whatever your preference is, but know that you have to double that because you fold the fabric in half.
Personally I love the rough look of this. You will have one clean edge from where you folded it and one frayed edge. Do a simple whip stitch to secure the rough edge.
Button holes are easy, just nip a little hole where you want it and whip stitch around.