Clothing

• Choose a high-fashion outfit made by a designer for the basis of your costume. You can purchase the outfit new or vintage, depending on your budget. For example, choose a simple long black designer dress and pair it with fishnet tights and a witch's hat for a high-fashion witch costume. A black pantsuit works for a black cat costume. With a ball gown, you could be a Hollywood starlet from the 1920s or '30s. Allow the main piece of the costume, the designer clothing, to guide the rest of the costume.
  
  

Accessories

• High-fashion accessories like shoes, tights, purses, jewelry and scarves can make your Halloween costume special if you choose them carefully. Wear a few designer scarves around your neck and waist if you are dressing as a Bohemian singer or a rock star. Choose the latest crazy designer shoes to accentuate the style of the rest of your costume. Use vintage high-fashion accessory items for costumes from past decades, such as a '60s housewife or a 1920s flapper costume.
  
  

Makeup

• Look to the runways for high-fashion makeup styles to complement your Halloween costume. Depending on the season, makeup styles vary from dark and dramatic to fairy-like and airy. Choose a costume that matches your favorite makeup look from the runways and try to replicate the look as closely as you can. Using makeup to create a couture look can help you achieve a high-fashion Halloween costume on a budget because makeup is dramatically less expensive than designer clothing or accessories.
  
  

Designers

• If you can afford to purchase a high-fashion look straight off the runway by a designer such as John Galliano or Alexander McQueen, you will turn heads in your Halloween costume. Many fashion designers enjoy creating a spectacle at their fashion shows with outfits, hairstyles and makeup that are worthy of Halloween costumes. From skeletal dresses to Victorian-style frocks with corsets, these looks can be taken as-is for your costume. This is haute couture at its finest, but can be difficult to procure without the help of a professional stylist.