This is a stencil/stamp I made for a 12 panel hacky sack (or footbag). To use, trace, or stamp out the pentagon 12 times on your fabric, and sew the panels together. As a guide on how to sew them, check this vid:

He explains it very well. If you stamp it (with ink pad), I added the little corner cut outs to show where you need to start sewing on each side. The size is correct to the size of panel that he is using in this video, and just makes it a bit easier to stencil it.