Eileen Fisher Petite Wool Blend Skirt in Black - it's a size Petite Large and in good pre-owned condition. 1st pic for style reference - length depends on your height.

A-line silhouette (slight flare)
Side zip + button closure
No stretch in waistband but skirt itself has some stretch
52% Wool, 46% Viscose, 2% Lycra
Waist 17" flat
Length 23.5"

#2