I picked out some that sort-of matched and were in colors I thought my sister-in-law would like (this is the other half of her recent birthday gift). I dug out some 1/4" elastic, measured around my wrist and got to work.
I alternated big and little, stacked some and kept the colors from 'touching.' I used white thread since all of my buttons were different colors. I tried laying out my design first, but didn't really prefer that method, as it was hard to tell how much to overlap the buttons when the elastic was flat. I did end up using a few more buttons than I had originally pulled (something to keep in mind if you want to make one).
modeled by the three-year-old
I think it turned out pretty cute! Certainly not something everyone will have! Now if only I had a reason to wear jewelry, I would be cranking these out for myself!