Boost the sophistication level of a sweater dress with gold jewelry. An armful of gold bracelets, a pair of gold hoop earrings and a single gold chain necklace can complement a sweater dress of just about any hue, including one featuring neutral tones. A black sweater dress with gold jewelry is a powerful color combination. Avoid dull pieces and go for bright and shiny gold -- even if it's not real.
Add a bright and beautiful scarf to your sweater dress look. You can either casually drape it around your neck and let it hang down in front, or wrap it a few times around your neck for a more sophisticated style. If your dress is a print, go with a solid-colored scarf with embellishment such as fringe. Keep other jewelry to a minimum so the focus is on your scarf.
A beaded necklace adds visual interest to your neckline, which is perfect if the design of your dress is fairly simple. In fact, the more simple your dress, the more elaborate and bold your beads should be. Turtleneck sweater dresses look great with a beaded necklace that lies across the top of the chest, while sweater dresses that show off some cleavage are best balanced with a choker-style necklace.
Pair a sophisticated sweater dress with a rich leather handbag. Leather is durable and classy, and you can choose from a wide array of styles. A bright and busy dress goes well with a more demure bag; a simple and plain sweater dress can be jazzed up with a more elaborate leather handbag.