- A gold dress can be a good foundation for a trophy wife costume. Ideally, the fabric of dress should be shiny or sparkly, so it actually looks like a trophy. If a gold dress isn't available, just buy some gold or other shiny fabric from a fabric store, and then wrap it around the person wearing the costume, like you would a toga.
- A crown or tiara can serve as a nice accent on the head of the person wearing the costume. Since trophy wives are often pampered, using a crown to communicate that sense of untouchable royalty can help communicate the meaning of the costume. Most party stores sell inexpensive crowns or tiaras.
- To really drive the point home, a trophy wife costume could be accessorized by having the person actually carry around a small trophy. Such an item can be had for little cost from most sports supply stores. It may even be possible to find a trophy to borrow for the event, as most households with children have a few laying around.
- Since most trophy wives end up collecting large, ostentatious jewelry, wearing it can help complete the costume. Obviously, real jewelry of a significantly large size can be quite expensive, so cheap costume jewelry can serve the purpose just fine. Emphasize sparkly, eye-catching pieces of jewelry, oftentimes covered with jewels as part of the costume. Don't forget the wedding ring with the gigantic diamond on the end.