Adding statement puffy sleeves, such as bell and trumpet shapes, to dresses and blouses are fun, chic, elegant, girly and sophisticated.
They are a great way to get noticed and make a fashion statement if you go for a loud and dramatic sleeve like large frills and ruffles. For a more simple, softer and feminine look go for bishop style sleeves.
When wearing statement sleeves it is recommended to keep the rest of your look minimal and classic so that you do not attract attention away from the sleeves and look overly fussy.