The dress/skirt shape that looks good on everyone and can be found in almost every collection in the history of Fashion. The A-line.
Although this style exists as long as people thrive on this planet, the term was first used by His Majesty Christian Dior, to describe his Spring 1955 collection.
It was the biggest trend those days! Known as “most wanted silhouette in Paris” it was widely popularized by Yves Saint Laurent, who back then was the hottest designer.