I went to Hobby Lobby and bought 2 yards of gray and white polka dot fabric. I followed this really easy pattern I found on HGTV's website.
Here are a few pictures along the way.
The pattern: printed, cut out, and taped together
Cutting out 8 identical pieces
Pieces paired up and ready to be sewn together
Two halves of the pouf - 4 pieces each
Finished Product