J.K. Rowling's "Harry Potter" series has consistently grown in popularity since the 1997 United Kingdom release of "Harry Potter and the Philosopher's Stone," later renamed "Harry Potter and the Sorcerer's Stone" in the United States. In the stories, young wizards engage in a game called Quidditch, the wizarding world's equivalent of football. Mortals, or rather, muggles, can all but fly with their own "Harry Potter" Quidditch costumes.
Find a robe that coincides with the dominant colour of your favourite Hogwarts house. Get a maroon robe for Gryffindor, green for Slytherin, blue for Ravenclaw or yellow for Hufflepuff. If you cannot find a robe that is already the right colour, you can purchase some fabric dye and dye a white robe.
Cut four strips of fabric that match the second colour of your Hogwarts house of choice. The strips should be the length of your sleeves. Use yellow fabric for Gryffindor, grey for Slytherin, orange for Ravenclaw or black for Hufflepuff. Sew or glue two strips along the sides of each robe sleeve.
Print your house badge onto a sheet of iron-on transfer paper. See Resources for images of each house badge. Iron the badge to the left chest area of the robe.
Find a pair of black sweat or jogging pants and pair of black shoes to wear beneath the robe.
Wear a pair of black swimming goggles to complete the Quidditch player look. Some costume stores sell specific Harry Potter Quidditch goggles, but any pair of swimming goggles will suffice.
Carry an old broom or draw Harry's signature zigzag scar on your forehead for added effect.