GU Stitch Mermaid Midi Skirt Size: XS, Color: Black. The waist has elastic in the back, making it an easy-to-wear skirt. It's made of denim, so it's a bit stiff, but the wide mermaid line allows for good leg movement. It appears to be in relatively good condition with no noticeable scratches or stains, but please understand that this is a personal inspection, and there may be oversights.