It fits perfectly for the size 5s and 6. If you need a different size of zipper, you can simply resize it like the following:

Find Your Zipper Size

Start by checking the back of your broken zipper slider, most zippers have a size number (1-10) embossed on the back of the slider. Once you know your zipper size, the sizing chart below will determine which size is right for you.

Measure Your Zipper 

If your zipper doesn’t have a number on the back, you can simply measure the width of the zipper teeth in millimeters or inches.

Size chart

How to scale your zipper

As you can see in the screenshot, the width of the lower part of the zipper is 6 mm. 

This means that if you have measured the size or know the number, you can scale your zipper using the following formula 

(new size ÷ old size) × 100 

For example, if your zipper size is 8, then you calculate ( 8 / 6 ) x 100 = 133
You can then enter the result in the scaling tool of your slicer.

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Credits: scarou