Magnets 101: A Designer’s Guide to Using Magnetic Closures in Sewn Products
When you're designing sewn products, whether it’s handbags, garments, accessories, or functional gear, magnets can offer a clean, intuitive, and often invisible closure solution. But magnets are not one-size-fits-all. The type you choose, how you apply it, and where you place it will directly impact your product’s function, durability, and user experience.
In this guide, we’ll walk through the basics of working with magnets so you can confidently decide if they’re the right fit for your design and how to use them effectively.
Part 1: The Basics of Working with Magnets
Compared to buttons, zippers, or hook-and-loop, magnets offer a unique advantage: they close themselves. This makes them especially useful in designs where ease of use, speed, or a clean aesthetic is important.
Magnets are commonly used in:
Handbags and wallets
Outerwear and fashion garments
Medical or adaptive products
Home goods and soft storage
Packaging and presentation pieces
Magnets are especially valuable when:
You want a minimal or hidden closure
The product needs to be easy to open and close with one hand
You’re designing for users with limited dexterity
You want a quiet, smooth user experience (no ripping, snapping, or pulling)
How Do Magnets Work?
Magnets attract each other through opposing poles (north and south). In sewn products, this usually means embedding two magnetic components that align and snap together when brought close.
Unlike mechanical fasteners, magnets don’t rely on tension, threading, or interlocking parts—they rely on proximity and alignment.
It’s important to note that magnets don’t “lock” in the traditional sense. Their effectiveness depends on strength, placement, and how the surrounding material supports them.
How Are Magnets Made?
Magnets are created by exposing certain metals or alloys, commonly iron, nickel, cobalt, or rare earth materials like neodymium, to a magnetic field that aligns their internal magnetic structure. Different manufacturing methods produce magnets with varying strengths, durability, and flexibility depending on the intended application.
If you're curious about the science behind how magnets work and how they’re made, this resource offers a deeper technical explanation: How Magnets Work – HowStuffWorks
Part 2: Types of Magnets Used in Sewn Products
Not all magnets are created equal. The type you choose will depend on your product’s function, materials, and production method.
Sew-In Magnets
These magnets are enclosed in a fabric or casing that allows them to be stitched directly into the product.
Sew-in magnets are best for:
Garments
Soft goods
Products requiring a clean interior finish
They’re secure and washable (depending on the casing), making them a reliable option for sewn applications.
Magnetic Snaps
Magnetic snaps are among the most common options for accessories. They typically include two magnetic halves with prongs that pass through the fabric and are secured with a backing plate.
Magnetic snaps are best for:
Bags and wallets
Structured accessories
Medium-weight fabrics
They’re relatively easy to install and provide a more “defined” closure point compared to sew-in magnets.
Rare Earth (Neodymium) Magnets
These are small but extremely strong magnets, often used when you need a powerful hold in a compact space. Their high strength-to-size ratio makes them ideal for concealed closures where bulk needs to be minimized.
Neodymium magnets are best for:
Small closures requiring a strong hold
Hidden or embedded applications
Products with thicker materials or multiple layers
Designs where a clean, flush closure is important (e.g. bags, outerwear, or structured accessories)
Neodymium magnets used in sewn products are typically encapsulated in plastic (such as PVC or TPU) to protect against corrosion and enable safe sewing into garments or soft goods. Many are designed to be washable, depending on how they are enclosed and applied.
However, these magnets require careful handling during development. Their strength can affect usability if not properly balanced and may require reinforcement or testing to ensure the closure feels intuitive rather than difficult to open.
Adhesive-Backed Magnets (Limited Use)
Some magnets come with adhesive backing, but these are rarely suitable for sewn products long-term.
Adhesive-backed magnets are best for:
Prototyping
Non-washable applications
Temporary placements
For production, a mechanical or sewn attachment is always more reliable.
Part 3: Key Characteristics of Magnets
Magnets vary widely in performance. Understanding these characteristics will help you choose the right option.
Strength (Pull Force)
This determines how securely the magnet holds. Too weak, and your product won’t stay closed. Too strong, and it becomes difficult to open.
Size and Thickness
Larger magnets generally provide more holding power, but also add bulk. In lightweight designs, even a small magnet can feel heavy or intrusive.
Coating and Finish
Magnets are often coated (nickel, epoxy, plastic) to prevent corrosion and improve durability. This is especially important in washable or humid environments.
Flexibility vs. Rigidity
Some magnets are rigid discs, while others are flexible strips. Flexible magnets are less common in sewn products but can be useful in larger surface areas.
Part 4: When to Use Magnets (and When Not To)
Magnets can be incredibly effective, but only in the right context.
Use Magnets When:
You want a clean, minimal aesthetic
The closure should feel effortless and intuitive
You’re designing for accessibility or ease of use
The product benefits from a self-aligning closure
Avoid Magnets When:
The product needs a high-strength, load-bearing closure
There is constant tension pulling the closure apart
The design requires precise alignment every time
The product will be used near sensitive electronics or medical devices
Part 5: Design Considerations for Magnets
Choosing a magnet is not just about the magnet itself—it’s about how it integrates into your product.
1. Consider the Material
Magnets behave differently depending on the fabric or material surrounding them.
Lightweight fabrics may require reinforcement to prevent distortion
Thick materials may reduce the magnet’s effective strength
Stretch fabrics can affect alignment and performance
This is similar to how material choice impacts performance across sewn products more broadly.
2. Think About Placement
Magnets need to align correctly to function. Even slight misalignment can reduce effectiveness.
During development:
Test placement carefully
Consider how the product moves in real use
Account for seam allowances and layering
3. Balance Strength and Usability
A strong magnet might seem like a safer choice, but if users struggle to open it, it creates friction in the experience.
Always prototype and test:
Opening force
Closing alignment
Repeated use over time
4. Plan for Production
How will the magnet be installed?
Sew-in magnets require precise construction steps
Magnetic snaps require hardware installation
Hidden magnets require layering and internal structure planning
As with hook-and-loop, the application method can significantly impact both production efficiency and durability.
Part 6: Care and Longevity
Magnets are generally low-maintenance, but design decisions still affect their lifespan.
Ensure magnets are properly enclosed or coated
Avoid prolonged exposure to moisture if uncoated
Reinforce the surrounding fabric to prevent wear
If magnets shift or break free from their placement, the closure will fail—even if the magnet itself is still functional.
Choosing the Right Magnet for Your Design
Here’s a quick checklist to guide your decision:
Function
How often will it be opened/closed?
Does it need to hold weight or just close lightly?
Material Compatibility
Will your fabric support the magnet?
Does it need reinforcement?
User Experience
Is it easy to open and close?
Does it align naturally?
Aesthetics
Should the magnet be visible or hidden?
Does it add bulk?
Production
How will it be installed at scale?
Is it consistent and repeatable?
Design Smarter: When Magnets Make Sense
Magnets offer a clean, intuitive alternative to traditional closures, but they require thoughtful integration.
When used well, they can elevate both the function and feel of your product. When used without proper consideration, they can lead to alignment issues, weak closures, or frustrating user experiences.
The key is to treat magnets not as a simple add-on, but as a design decision that needs to be tested, validated, and supported by the rest of your product development process.
Ready to move forward with your product? Book a consultation to get support selecting the right materials and closures for your design.