Why not consider teaming a crew-neck t-shirt with a grey a-line skirt? As well as super practical, both items look wonderful paired together. Tone down the casualness of this getup with a pair of dark brown suede over the knee boots.
Grey A-Line Skirt with Crew-neck T-shirt Smart Casual Outfits
If you want take your casual style to a new level, dress in a crew-neck t-shirt and a grey a-line skirt. You know how to dress it up: black leather pumps.