's Karl Lagerfeld topped a slouchy suit and chunky oxfords with a boxy jacket. Leave the "tomboy" aspect behind for the office and go in the "ladylike" direction by tucking a tank into slim-cut trousers.
Jersey tank with beaded necklace, T-bags, $195; net-a-porter.com
. Cotton jacket, Topshop, $90; topshop.com
. Wool-blend crepe pants, Tibi, $265; net-a-porter.com