In this tutorial, we learn how to sew and measure elastic. First, place the elastic over your waist and think about what you are making. Decide if you want it to be comfortable or if you want it to be tighter if you are wearing it out during the day. Also take into account what type of fabric you are going to be using so you know how much elastic is needed. Fold the elastic and mark the inside and outside of the fold, now do the same thing with your fabric. Now you will know if you need to ease your fabric and you can sew on the elastic to the fabric slowly. Don't go too quickly or the elastic will fall off.