It’s just a basic skirt shape with some lines marked. Years ago I cut something like this out of heavy paper using a string for a compass, and it’s come in handy dozens of times for all kinds of applications.
I thought I’d share it in case someone finds it useful. Here it is as a printable pdf that tiles over many sheets of paper. File to download and print.
This single piece can make a simple A-line skirt with a gentle flare, either gathered with elastic or with a waistband or yoke. There’s lots of lines on it so it can be used for various lengths and widths.