All the following are proper dresses for Opera shows, please click on the picture for enlarged view:
1. Some examples of the so called “little-black-dresses”, typically suggested for cocktail parties:
2. Some examples of long dresses, typically suggested for evening parties and formal occasions:
3. Some examples of dresses with over coat – still formal, but able to [...]
Here are some photos of real people at opera shows (click on picture to enlarge):