Nice condition! There is no size tag; it looks like a small. There have been some straight stitch repairs in a few spots at the hem. Please see the photos and measurements below.

When laying flat, the waist measures 11.5 inches (it can stretch past 15 inches).   
The measurement from the side/waist to hem is 38 inches.   
This skirt is in nice condition and comes from a smoke free home. 
Thanks for looking!