Fashion design is the art of applying design, aesthetics and natural beauty to clothing and its accessories. It is influenced by cultural and social attitudes, and has varied over time and place. Fashion designers work in a number of ways in designing clothing and accessories such as bracelets and necklaces. Because of the time required to bring a garment onto the market, designers must at times anticipate changes to consumer tastes.

Designers conduct research on fashion trends and interpret them for their audience. Their specific designs are used by manufacturers. This is the essence of a designer's role; however, there is variation within this that is determined by the buying and merchandising approach, and product quality; for example, budget retailers will use inexpensive fabrics to interpret trends, but high-end retailers will ensure that the best available fabrics are used.

Fashion designers attempt to design clothes which are functional as well as aesthetically pleasing. They consider who is likely to wear a garment and the situations in which it will be worn, and they work within a wide range of materials, colors, patterns and styles. Though most clothing worn for everyday wear falls within a narrow range of conventional styles, unusual garments are usually sought for special occasions such as evening wear or party dresses.

Clothing design and creation was handled by largely anonymous seamstresses, and high fashion descended from that worn at royal courts. Worth's success was such that he was able to dictate to his customers what they should wear, instead of following their lead as earlier dressmakers had done. The term couturier was in fact first created in order to describe him. While all articles of clothing from any time period are studied by academics as costume design, only clothing created after 1858 is considered as fashion design.

It was during this period that many design houses began to hire artists to sketch or paint designs for garments. The images were shown to clients, which was much cheaper than producing an actual sample garment in the workroom. If the client liked their design, they ordered it and the resulting garment made money for the house. Thus, the tradition of designers sketching out garment designs instead of presenting completed garments on models to customers began as an economy.