How long are trailers before movies?

Related questions

1. What is the difference between a teaser and a trailer?
2. Does a movie runtime include previews?
3. Do trailers start at movie time?
4. What is the difference between a preview and a trailer?
5. Is teaser and trailer the same?
6. What is the difference between promo and trailer?
7. How long is a teaser trailer?
8. How long should a trailer be for a short film?
9. Why is a movie trailer called a trailer?
10. How long are trailers before a film?

Tags

1. #unfortunately
2. #start
3. #little
4. #depends
5. #where
6. #normally
7. #minutes
8. #there
9. #movie
10. #movies
11. #theater
12. #would
13. #trailers