S - Sally LaPointe Heathered Gray Knit Wrap Tie Waist Pencil Skirt 1211ES

Measurements: 

Because sizes tend to vary among brands, we take approximate measurements with the garment lying flat and unstretched.

For the best fit, take a tape measure and compare a similar garment from your own to  find out what size you are. The following measures are essential: 

Waist (laying flat): 12.5"

Length: 27.5"