Wedding guest dresses come in a variety of styles, colors, and materials. The right dress for a wedding guest will depend on the dress code and the season. For a formal wedding, a long dress or a cocktail dress is appropriate. For a semi-formal or casual wedding, a shorter dress or a jumpsuit can be a good option. It's important to consider the wedding's theme and location when choosing a dress. Lighter colors are typically worn in the spring and summer, while darker colors are more appropriate for fall and winter weddings. Ultimately, the goal is to choose a dress that is comfortable, flattering, and fits the dress code.