Making hair bows with ribbons that are cut to the right size is pretty easy. Here is the stuff you will require to begin with:
Several rolls of ribbon. These can be of satin, cotton or any other material as long as they are a little study. Something like crepe is great to use for ribbons too.
Some small pieces of wire. Ensure that these are properly molded and do not have sharp ends or edges that can hurt the wearer of the hair bow spoiling all your effort. Floral pieces of wire are often used for hair bows and can be cut easily.