About the size of the zipper

Internationally, zipper sizes are expressed in #, and Millimeter/Inch is used to measure the teeth width. Typically, the size of a zipper is an approximation of its teeth width in millimeters when it is closed. The measurement won’t line up neatly with the zipper size, with a deviation that could range from minus 0.8 to 1.85.

Dependent on the system of measurement, the unit used to recognize the teeth width may vary from country to another. It is important to understand the relationship between the different measurement units.

Relationship between Inch and Millimeter

1 cm=10 mm

1 inch=2.54 cm

1 inch=25.4 mm