Once you have all your pieces cut you are going to cut your skirt, to get the dimensions you will need your model’s waist and their floor to waist measurements. Once you have their waist measurement, double that. Next measure the length from the floor to their waist. If you want it to be a little bit longer you can add length, I like to add one inch for seam allowances.  Those are your measurements for your skirt. If you need to cut it into two pieces, you can. I prefer the look of three pieces when I don’t have a piece of fabric big enough. To do that cut two pieces half the width of the waist measurement and one piece the width of the waist.