Measuring a zipper for tape involves determining the functional length of the zipper itself, which dictates the length of the fabric tape needed. According to the reference provided, you measure the zipper from the bottom all the way up to the top stops.
Understanding Zipper Measurement
When measuring a zipper for tape length, you aren't measuring the entire piece of fabric tape from end to end. Instead, the standard industry measurement refers to the usable length of the zipper chain and slider. This is crucial for ensuring the zipper fits correctly into your garment or project.
The Measurement Process
Here's a simple breakdown of how to measure a zipper's tape length:
- Gather Your Tool: You will need a flexible tape measure.
- Locate Start Point: Identify the very bottom of the zipper. This is typically where the two sides of the zipper tape merge below the slider when closed. On separating zippers, this is often the bottom stop box.
- Locate End Point: Find the top stops. These are the small metal or plastic pieces at the very top of the zipper chain on each side, which prevent the slider from coming off.
- Measure: As the reference states, "you measure from the bottom all the way up to the top stops." Lay your tape measure straight along the zipper chain, starting at the bottom and extending to the top stops.
This measurement gives you the effective length of the zipper tape that will be incorporated into your project.
Why Measure This Way?
Measuring from the bottom stop (or bottom of the chain) to the top stops provides the precise length of the functional zipper opening. The extra fabric tape above the top stops is typically sewn into a seam allowance or facing and is not part of the measured length used in patterns or specifications.
Practical Tips
- Ensure the zipper is fully closed when measuring, especially for separating zippers, to accurately locate the bottom stop.
- Lay the zipper flat and straight to avoid kinks that could affect the measurement.
- Always measure twice to confirm accuracy.
By following this method, you can confidently select or order zippers of the correct length for your sewing and crafting projects.
