What you will need:
-At least 12 ties
-1/2 yard of tulle
-fabric to line inside
1. First thing you want to do it cut open the back of the ties (see picture). And the sew the ties together.
2. It will look like crap but don't worry about that just yet. Now you can sew on the inside lining and tulle.
3. Then fold over the top inside of the skirt and place elastic inside. Sew shut. It helps to have a color of thread that won't stand out...I didn't have any obviously.
Really you can just make it up as you go...that's what I did.