I hear a lot of people who are unable to buy fishing net, or who maybe want it in a different colour/gauge. I myself have the supplies I need to make it myself, and would rather spend what little mer-funds I have on something else.

So, I found these two videos to be very helpful. You can make different knots (I think the most common is a square knot, but I've also seen an overhand knot used), make the space between strings smaller or bigger, and you can use all sorts of things like yarn, cord, etc. to make them. I plan to make my own net for a top and possibly a belt as well.