The 4 Must-Have Pieces for Fall

The Black Skirt: Weekend

A roomy skirt that doesn't look sloppy (Thrive, $350) is fabulous for Saturdays...or anytime. Add layers so you can pile on or peel off as the weather evolves (it's nice to work in some brown—more casual than black): This striped shirt (Jones New York Signature, $69) is topped by a bicolored cardigan (Christopher Fischer, $198) and metallic lambskin jacket (Lafayette 148 New York, $898). 

Boots, Kenneth Cole.