Measure the distance around the piece you are covering. Now double it for a gathered look. Measure top to bottom including half inch for seem. CHEATER TIP: use the selvage as the bottom of the skirt and you will not need a hem. Yes, yes, I know you will be sewing against the grain. It will not matter for this type of covet or fabric.
I'm a maker and a thinker. I live in a magical world inside my head. To some, I am an artist. I am surely creative. And my creations change as quickly as my mood - so you never know what you're going to get.