Zipper Pulls Explained: When to Use #3 vs #5 Zipper Pulls

Quick answer

#3 zipper pulls fit size #3 nylon coil zipper tape, while #5 zipper pulls fit size #5 tape. They are not interchangeable. Choose #3 for small pouches and lightweight bags, and #5 for handbags, backpacks, and any project that needs a sturdier pull. If you are replacing a pull, match the number on your existing zipper tape.

Zipper pulls are the finishing touch that makes a bag feel custom, but the wrong size will jam, slip, or look off. The two most common sizes you will see are #3 and #5, and they are not interchangeable. The number refers to the width of the zipper teeth in millimeters when the zipper is closed, so a #3 pull only fits #3 tape and a #5 pull only fits #5 tape.

This guide compares #3 and #5 zipper pulls using real product examples from Zipper Valley, so you can match the pull to your tape, your project, and your preferred look. You will also find practical tips for metal zipper pulls, zipper pull replacement, and choosing the right size for bags.

What the numbers mean

In the zipper industry, the number indicates the width of the zipper teeth in millimeters when the zipper is closed. A #3 zipper has teeth about 3 mm wide, and a #5 zipper has teeth about 5 mm wide. This is a global standard, so a #3 pull from one brand will generally fit #3 tape from another brand, and the same goes for #5. The number does not refer to the length of the pull or the length of the zipper tape.

Because the size is based on the teeth, the pull must match the tape size. A #5 pull on #3 tape will be too loose and may slide off or fail to lock. A #3 pull on #5 tape will not fit over the teeth at all. Always check the zipper tape size before buying pulls, especially when replacing a broken pull.

• Check the number printed on the zipper tape or the original packaging.
• If you cannot find the number, measure the width of the teeth in millimeters when the zipper is closed.
• When in doubt, buy a sample pack or a bundle that includes both sizes.

Size #3 zipper pulls: best for small, lightweight projects

Size #3 zipper pulls are designed for #3 nylon coil zipper tape. This size is ideal for small pouches, wristlets, pencil cases, and lightweight bag pockets. The smaller pull keeps the scale proportionate on petite projects and adds less bulk. If you are making a delicate clutch or a coin purse, a #3 pull will look more refined than a chunky #5 pull.

However, #3 pulls are not built for heavy daily use. The smaller surface area and lighter construction mean they can feel less substantial in your hand, and they may not stand up to constant tugging on a large bag. For a backpack or a handbag that gets opened dozens of times a day, a #5 pull is usually the better choice.

• Pair #3 pulls with #3 zipper tape, such as Mill Springs - #3 Silver Nylon Coil Zipper Tape.



• Use #3 pulls for internal pockets, small pouches, and lightweight bags.
• Avoid #3 pulls on projects that will carry heavy tools or books.

Size #5 zipper pulls: best for handbags and backpacks

Size #5 zipper pulls fit #5 nylon coil zipper tape, which is the most common size for handbags, backpacks, and everyday pouches. The larger pull is easier to grab, more comfortable to use, and generally more durable. If you are making a bag that will see daily use, #5 pulls are the safer bet. They also come in a wider variety of styles, including metal zipper pulls that add a premium look.

The trade-off is bulk. On a tiny pouch, a #5 pull can look oversized and may overpower the design. Also, #5 tape and pulls are slightly heavier than #3, which matters if you are counting every gram for a ultralight project. For most bag makers, though, the durability and ease of use are worth the extra weight.

• Pair #5 pulls with #5 zipper tape, such as Lavender - #5 Silver Nylon Coil Zipper Tape or Black - #5 Black Nylon Coil Zipper Tape.
• Use #5 pulls for handbags, backpacks, and pouches that get heavy use.
• Consider #5 pulls with a locking mechanism if you want the zipper to stay closed.

Metal zipper pulls: style and function

Metal zipper pulls are a popular upgrade for bag makers because they add a high-end look and a satisfying weight. They are available in finishes like silver, gold, gunmetal, and rose gold, so you can match your hardware. Many metal pulls are non-locking, which means they slide freely. If you need a pull that stays put, look for a locking style.

One thing to keep in mind: metal pulls can be heavier than nylon or plastic pulls, and they may show scratches over time. For a bag that will be washed frequently, a nylon pull might be more practical. But for a statement bag or a gift, metal pulls are hard to beat.

• Match the metal finish to your bag's hardware for a cohesive look.
• Non-locking pulls are fine for most bags, but locking pulls are better for security.
• Test the pull on a scrap of zipper tape before installing it on your final project.

How to replace a zipper pull

Replacing a zipper pull is a quick fix if you have the right size. First, identify whether your zipper tape is #3 or #5. Then choose a pull that matches. To remove the old pull, slide it to the end of the tape and gently work it off the teeth. If the tape has a stop at the end, you may need to cut it off or use pliers to remove the old pull.

To install the new pull, slide it onto the tape at the top end and pull it down to engage the teeth. If the pull is non-locking, it will slide freely. If it is locking, make sure the lock engages when the pull is flat against the tape. Always test the pull before sewing the zipper into your project.

• If you are unsure of the size, buy a bundle that includes both #3 and #5 pulls.
• Use a pair of needle-nose pliers to gently open the old pull if it is stuck.
• For a quick style change, try a zipper pull bundle like Movie Magic - Zipper Pull Bundle.

Trade-offs: #3 vs #5 zipper pulls

• Size #3 zipper pulls: Fit #3 nylon coil zipper tape. Best for small pouches, wristlets, and lightweight bags. Smaller and lighter, but less durable for heavy use. Choose #3 for delicate projects where scale matters.
• Size #5 zipper pulls: Fit #5 nylon coil zipper tape. Best for handbags, backpacks, and everyday pouches. Larger, easier to grab, and more durable, but bulkier. Choose #5 for bags that get daily use and need a sturdy pull.
• Metal vs nylon pulls: Metal pulls add a premium look and weight but can scratch and are heavier. Nylon pulls are lightweight and color-matched but less flashy. Match the pull material to the bag's style and care routine.

Product facts

• Mill Springs - #3 Silver Nylon Coil Zipper Tape: Size #3 zipper tape is ideal for handbags, pouches, and backpacks. The teeth look like metal but they're nylon, and you can cut it to any length and sew right over it without breaking your needles. Pair this tape with #3 zipper pulls for small to medium projects. The nylon teeth are durable and needle-friendly, so you can sew through them without special tools.
• Lavender - #5 Silver Nylon Coil Zipper Tape: Size #5 zipper tape is ideal for handbags, pouches, and backpacks. It slides like butter, time after time, and you can cut it to any length. Use this tape with #5 zipper pulls for larger bags that need a sturdy, smooth-gliding zipper. The silver nylon coil looks high-end and works with a variety of pull styles.
• Movie Magic - Zipper Pull Bundle: Includes eight different zipper pull designs, two of each style: Castle, Skull Key, Magic Key, and Melting Apple. These are size #5, non-locking zipper pulls that are ultra shiny and durable, and they slip onto any size #5 nylon zipper tape. A convenient way to try multiple #5 metal pulls on your next bag. Since they are non-locking, they are best for projects where you don't need the zipper to stay locked.

Which size should you choose?

Best for

• Small pouches, coin purses, and lightweight bags that need a delicate look.
• Replacing a #3 zipper pull on an existing #3 zipper tape.
• Projects where you want to minimize bulk and weight.

Not for

• Heavy-duty backpacks or bags that carry a lot of weight.
• Projects that need a large, easy-to-grab pull.
• Anyone who wants a locking zipper pull for security.

Matching your zipper pull to your zipper tape size is the key to a smooth, professional finish. Use #3 pulls for small, lightweight projects and #5 pulls for handbags and backpacks. When in doubt, check the number on your tape or measure the teeth. With the right size, your zipper will glide smoothly and look great for years.