In one sentence, describe what the following article is about:

You can buy one from a costume shop or a party supply store. Keep in mind that the quality of these costumes is not always the best. Despite this, you can always use the dress part, and use a different belt. Princess Leia wore a white, loose-fitting gown with a hood and long, flowing sleeves. Try to find a white tunic dress that has long, loose sleeves. Get a white pillowcase and cut open the side seam. Hem the cut part inward by 0.5 inches (1.3cm). Gather the two narrow edges with a running stitch, then sew them to the neck part of your dress, using a 0.5 inches (1.3cm) seam allowance.
Consider buying your Leia costume. Consider using found objects.