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How to Identify a Zipper Size

Updated November 21, 2016

A zipper is an inexpensive part of a piece of clothing, but when a zipper breaks, it renders a garment unwearable. Seamstresses can give your apparel a second chance by replacing broken zippers for a fee. Those who are savvy with a needle and thread can replace zippers with minimal effort. But not all zippers are the same. Determine the defective zipper's size and replace with another of the same size.

Flip back the zipper's slide and look for a number. This number is usually the size of the zipper.

Measure the width of the zipper's teeth in millimetres after the zipper is closed, if there is no number on the slide. Use this measurement for the zipper's size. If the teeth are five millimetres wide, then the zipper is a size five.

Measure the length of the zipper in inches or centimetres from the stop at the top of the zipper to the stop at the bottom of the zipper. Find replacement zippers sorted by type, length and colour at any store that carries sewing supplies.

Tip

Always take zipper measurements while the zipper is closed or zipped.

Warning

Keep in mind that zipper size is different from zipper length. When measuring a zipper's length, do not include the fabric that borders the zipper in your measurement.

Things You'll Need

  • Zipper
  • Ruler
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