If you are over forty and you are looking for an outfit for a formal event such as a black tie affair, it is important to follow the proper protocol for formal events. Most times, the event will take place during the late afternoon or evening. You will have a wide variety of fabrics to choose from as well as styles.
One customary thing, though, is that the dress has to be full length, an evening gown or an elegant cocktail dress. One of the main gaffes in dressing formally is that women try too hard to find the cutest dress and that may not work out very well. Don't forget that you want to be the person who stands out in the crowd and your dress is only there to offer support! If you don't know what to purchase, always go for simple. Choose styles that flatter your body when you are not sure. You cannot go wrong with a long evening dress, the right accessories, the right hairstyle and the right purse.
Choose something with a simple design and metallic finish to add elegance and an outfit that keeps up with the standards of formal wear. For women over forty, pay attention to how the sleeves and neckline are cut. Many formal gowns tend to be without sleeves and have plunging, but not really low cut necklines.