what would a 16-measure aria look like?

A 16-measure aria would typically have the following structure:

- Introduction (2 measures)
- Section A (4 measures)
- Section B (4 measures)
- Section A' (4 measures, similar to Section A but with some variations)
- Conclusion (2 measures)

This structure is a common format for arias in classical music, where the singer typically conveys emotions or tells a story through the lyrics and music. Each section may have its own melody, rhythm, and dynamics, and the overall piece would typically showcase the singer's vocal range and abilities.