How do you measure chainrings?

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Tags

1. #those
2. #right
3. #diameter
4. #number
5. #chainrings
6. #crank
7. #adjacent
8. #bolts
9. #approximate
10. #metric
11. #circle
12. #numbers
13. #photos
14. #measurement
15. #compare
16. #english
17. #holes
18. #table
19. #column
20. #between