How do I know what size zipper to buy?

Related questions

1. Does real Louis Vuitton have yellow stitching?
2. Why does every zippers say YKK?
3. Is YKK the best zipper?
4. Is YKK the only zipper company?
5. What does #5 zipper mean?
6. What percentage of zippers are YKK?
7. Why are all zippers YKK?
8. How big is a number 10 zipper?
9. Does Louis Vuitton use YKK zippers?
10. Is YKK a monopoly?

Tags

1. #start
2. #neatly
3. #zipper
4. #teeth
5. #measure
6. #possible
7. #width
8. #correlate
9. #actual
10. #roughly
11. #might
12. #measurement
13. #should
14. #millimeters
15. #closed