How long should a trailer be for a short film?

Related questions

1. How long are trailers at AMC?
2. What is the difference between a preview and a trailer?
3. How long are truck trailers?
4. Is a teaser a trailer?
5. Does a movie runtime include previews?
6. How long are trailers at Regal?
7. What is the difference between a teaser and a trailer?
8. How long are trailers before a film?
9. How long are trailers before movies?
10. Why is a movie trailer called a trailer?

Tags

1. #teaser
2. #anywhere
3. #think
4. #often
5. #minute
6. #trailer
7. #short
8. #would
9. #treat
10. #seconds
11. #entirety
12. #should
13. #minutes
14. #about