Drape yourself in this simple toga and golden sash fancy dress and you'll look the part for the toga party.
The simple white tunic hangs in folds, you could try cinching it in with a little gold belt if you had one, though this isn't traditional. The gold sash is quite generous in width and just lies across your shoulder. You also get the gold head dress.
This same costume fits men also and so makes a good couple costume.