This is a fun free pattern. I followed it loosely, did not reduce 1 stitch for body and ended up with an even stitch count for eyelet spacing.

I lined the bag with simple quilting quarter fabric and added eyelets with a tool. Leftover rattail was used as strings.

This sack will hold my MELT soft balls when I teach a class, I needed something bigger than what I had that holds at least a dozen balls.