I just received my very first Kooba today! I would like a chameleon to go with it. I ordered a small the other day and then started thinking that I might need a bigger one. So I then ordered a medium. Neither have arrived yet but my Ginger is much bigger than I thought it would be so now I am wondering if I might need a large Chameleon. What size do you girls use for your Kooba bags? I am wondering if the small is too small if Kathy will let me exchange it for a large if I need it. I am not sure what to do.