Zipper for different Application
How to Calculate Zipper Length Accurately for Different
Applications
Zippers are essential components in garments, bags, and
upholstery. Choosing the correct zipper length is crucial for functionality and
aesthetics. Understanding how to measure and calculate zipper length accurately
can help avoid fitting issues. This article provides a step-by-step guide to
calculating zipper length for various applications.
Understanding Zipper Length
Zipper length is the distance from the top stop to the
bottom stop, excluding any extra fabric tape beyond the stops. The measurement
method may vary slightly depending on the type of zipper.
Types of Zippers and Their Measurement Methods
- Closed-End
Zippers: Used in trousers, dresses, and bags, these zippers have a
stopper at the bottom. The length is measured from the top stop to the
bottom stop.
- Open-End
Zippers: Found in jackets and coats, these zippers separate
completely. The measurement is taken from the top stop to the box at the
bottom.
- Two-Way
Zippers: Used in luggage and heavy coats, these have two sliders and
are measured similarly to open-end zippers.
- Continuous
Zipper Chains: These are long zipper rolls used in upholstery and
tents. The length is determined based on cutting requirements.
How to Calculate Zipper Length?
1. Measuring a Zipper for Replacement
- Lay
the zipper flat and measure from the top stop to the bottom stop.
- If the
zipper is missing, measure the opening length and add an extra 1 cm (for
sewing allowance).
2. Calculating Zipper Length for a Garment
- Pants/Jeans:
Measure the fly opening and add an additional 1 cm.
- Dresses
& Skirts: Measure the back or side opening where the zipper will
be placed.
- Jackets
& Coats: Measure from the top of the garment to the hem.
3. Calculating Zipper Length for Bags & Upholstery
- Pockets
& Compartments: Measure the opening length and add at least 2 cm
for seam allowance.
- Cushions
& Tents: Consider the total opening length and ensure the zipper
extends slightly beyond for flexibility.
Factors to Consider When Choosing Zipper Length
- Zipper
Type: Different types require different measuring techniques.
- Fabric
Stretch: Some materials may require a slightly shorter or longer
zipper.
- Sewing
Allowance: Always account for additional fabric needed for
installation.
Conclusion
Calculating zipper length correctly ensures smooth
functionality and a professional finish. Whether replacing an old zipper or
selecting one for a new design, proper measurement techniques help avoid costly
mistakes. Always double-check your measurements and consider factors such as
fabric stretch and seam allowances for the best results.
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