What are the sizes on a ruler?

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Tags

1. #designated
2. #units
3. #often
4. #numbers
5. #rulers
6. #divded
7. #large
8. #inches
9. #either
10. #ruler
11. #millimeters
12. #which
13. #metric
14. #called
15. #international
16. #instead
17. #based
18. #centimeters
19. #system
20. #sometimes