Cynthia's is a provider of a variety of costumes for various dress up events, themed parties and programs. Based in San Carlos, Calif., it also provides costume rental options for several occasions, including seasonal holidays, dance recitals, photo sessions and others. Additionally, Cynthia s offers its vast customer base an array of products, such as hats, masks, accessories, decorations and many more. It organizes parties with a variety of themes for children and adults, offering costumes, props, stories, music, games and decorations. Its themes include fairyland, Treasure Island, medieval knights and jungle animals.