Kindle cover

I worked on a Kindle cover for my niece last week and now we’re trying to get together so she can try it for size.  Since I don’t have a Kindle, I had to rely on measurements she gave me.  I made a prototype and then we figured how to tweak it to make it better.  I haven’t sewn the button for closure on yet.
This is the inside with folded squares to slip the Kindle under.
I looked through my buttons and I like the bone button but it might be too thick and bulky.  I’ll let my niece decide.  We could also use the button I have on the prototype.