Name: Custom magnets
Brand: Sticker Mule
SKU: cm

Learn how magnets work—from materials like ferrite to neodymium, to strength factors. Explore expert insights from Sticker Mule on magnet durability & power.

How do magnets work? Strength, materials & more

Create your own National Park magnets with Studio. Skip generic gift shop souvenirs and turn your favorite photo into a high-quality keepsake in minutes.

How to make your own National Park magnets

Discover the fascinating history of fridge magnets—from their industrial origins to becoming nostalgic souvenirs and customizable keepsakes.

Fridge magnets: A definitive history

Our flexible [custom magnets](https://www.stickermule.com/products/custom-magnets) are made by mixing iron (ferrite) powder with a proprietary blend of rubber and plastic compounds. The ferrite powder contains magnetic properties, while the rubber and plastic help create a pliable material. This mixture is pressed into sheets. The front of each sheet features high-quality white vinyl. Each sheet is printed with your custom design and carefully cut to match its unique shape. The end result is a durable, flexible, and vibrantly colorful magnet with your one-of-a-kind design! 

![Image of different flexible custom magnets](https://storage.googleapis.com/sm-content/blog/c3f50389-bc69-4464-adc1-f2af57726fa8)

If you're interested in learning more, check out our blog post, [How do magnets work?](https://www.stickermule.com/blog/how-do-magnets-work)

What are your magnets made of?

Don't let their size fool you! Our [custom magnets](https://www.stickermule.com/products/custom-magnets) are thin, high-energy magnets with a pull of 65 pounds per square foot. This means one square foot of material can hold up to 65 pounds. That's stronger than most flexible custom magnets on the market today. 

In practical terms, this means:

- They'll easily hold three sheets of standard 8.5"x 11" paper on a fridge, so you can turn your kid's art into a magnet to hold your kid's art! 

- They'll stay stuck to cars driving at highway speeds, so you can boast that "my other car is a bicycle" wherever you go.


If you're interested in learning more, visit our blog post [How do magnets work?](https://www.stickermule.com/blog/how-do-magnets-work)

How strong are your custom magnets?

Our [custom magnets](https://www.stickermule.com/products/custom-magnets) are about 0.38mm, or 15 mils, thick. For reference, this is about the same thickness as our vinyl stickers with the backing on. Mil is a unit of measurement equal to one-thousandth of an inch and is commonly used for measuring products like magnets and stickers. 

It's important to keep in mind that thicker magnets do not necessarily mean stronger magnets. In fact, many of our competitors use magnets that are 20 to 30 mils but have weaker magnetic pull. The strength of a magnet depends more on the quality of the raw materials and the manufacturing process than on thickness alone. 

![magnet-stickers-thickness](https://storage.googleapis.com/sm-content/support/537788e071389de9fc2a43355155d82e29ac18c7)  

For more details about our magnets, visit our blog post, [How do magnets work?](https://www.stickermule.com/blog/how-do-magnets-work)

How thick are your custom magnets?

With [proper care](https://www.stickermule.com/support/magnet-care-guide), our [custom magnets](https://www.stickermule.com/products/custom-magnets) can last for many years. We use durable materials and waterproof ink to produce strong magnets with vibrant, lasting colors. 

As with any product, a magnet's life expectancy depends on how you use it and its exposure to the elements. Magnets used to decorate your fridge, for example, will maintain their vibrancy longer than magnets on your car, which are subjected to persistent sunlight, rain, dirt, and wind.

Our magnets can be used both indoors and outdoors. However, they do not have a UV laminate, so outdoor magnets may fade more quickly if they're consistently in direct sunlight. To ensure a long life, avoid exposing your magnet to extreme heat, moisture, or chemicals and subjecting it to physical wear and tear. 

Read our blog post [How do magnets work](https://www.stickermule.com/blog/how-do-magnets-work) for some tips on ways to breathe new life into any magnet that's lost its mojo.

How long do your magnets last?

[Custom magnets](https://www.stickermule.com/products/custom-magnets) are attracted to ferromagnetic materials. These are materials that contain strong magnetic properties, such as iron, steel, nickel, or cobalt. Magnets will NOT stick to aluminum, copper, brass, and most stainless steel.

Some common household items that contain ferromagnetic materials include: 
- Steel door refrigerators
- Metal filing cabinets
- Dishwashers with steel exteriors
- Whiteboards with a steel backing
- Metal doors
- Washing machines and dryers with steel exteriors
- Toolboxes
- Steel shelving
- Metal beams or frames

The fun thing about designing magnets for household items is that they can be attractive *and* practical. For example, a refrigerator magnet with a calendar, a "clean/dirty" magnet for the dishwasher, or whiteboard magnets featuring additional white space to [write on](https://www.stickermule.com/support/can-i-write-on-your-magnets) with a dry-erase marker.

What do magnets stick to?

We can accommodate any size, from a tiny 0.75" x 0.75" [fridge magnet](https://www.stickermule.com/uses/custom-fridge-magnets) to a 3' x 2' [magnetic car sign](https://www.stickermule.com/uses/car-magnets) and anything in between. On the order page, we've listed the most common sizes, but you can select the custom size option to enter any custom size you'd like.

Not sure what size to order? Here are some popular examples: 
- __Business card magnets:__ 2" x 3.5"
- __Car magnets:__ 12" x 18" or 18" x 24" or 24" x 36"
- __Fridge magnets:__ 2" x 2" or 3" x 3"
- __Travel souvenir photo magnets:__ 3" x 4" 
- __Standard postcard size for family pictures:__ 4" x 6"
- __Event keepsakes:__ 3.5" x 5"
- __Large photos and decorative designs:__ 5" x 7"
- __Calendars and schedules:__ 6" x 8"
- __Dry-erase memo boards or meal planners:__ 8.5" x 11"

Remember, your magnets don't just have to be square, rectangle, oval, or circle! We can cut your magnet into any custom shape that fits your artwork and design. We can also include one inner cut with these stipulations:

- Your inner cut must be at least 0.25" in diameter
- There must be 0.25" material between the inner cut and outer edge.

If you're not sure what any of this means, don't worry. We'll guide you through the proofing process, or feel free to [reach out](https://www.stickermule.com/support/contact) with any questions! 

What size magnets are available?

Our [magnets](https://www.stickermule.com/products/custom-magnets) have a 65-pound per square foot pull strength, allowing them to securely adhere to cars and stay put at highway speeds. Their durable material resists rain, snow, and sleet. Made from 15mil (0.38mm) material, they offer a stronger hold, better adhesion, and a more aerodynamic design than the 20mil (0.5mm) or 30mil (0.726mm) magnets sold by many competitors.

Flexible magnets generally won't damage car paint if used properly, but we recommend the following best practices to keep your car and your magnet in good shape.

- __Apply to a clean, flat metal surface__ with no dents or deep curves.
- __Remove and reposition regularly (weekly is ideal).__ Be sure to remove any trapped dirt or debris and clean any moisture that might have collected under the magnet.
- __Store flat when not in use__ to prevent warping.
- __Avoid applying over decals or vinyl wraps.__
- __Avoid prolonged exposure to extreme heat__ (such as direct sun), which may compromise the magnet's backing.

Follow these tips, and your [custom car magnet](https://www.stickermule.com/uses/car-magnets) will serve you for years to come! 

Will magnets stick to cars? Will they damage car paint?

Not all custom magnets are created equal. Our precision die-cut magnets are exceptionally strong, waterproof, and printed with rich, vivid colors that won't fade. Give your customers a magnet that reflects your brand—strong, vibrant, and built to last.

Custom magnets are a fun, practical way to keep your brand in sight. Lightweight yet strong, they're easy to share and loved by customers for both their usefulness and visual appeal. Perfect for business promotions, event giveaways, and unique gifts, they keep your brand visible on fridges, cars, and more—delivering effortless exposure while delighting your audience.

Custom magnets on fridge

Custom magnets on whiteboard

Custom magnets on car

Perfect for giveaways, promotions, and gifts

Custom magnets

Sticker Mule's custom magnets are a great way to promote your business, showcase your brand, or share big news. Printed in full color and cut to any shape, they're designed for versatility and impact. With easy ordering, free proof revisions, and fast delivery, getting custom magnets has never been easier.

Premium quality magnets that make an impact

I’m very excited about how these turned out!

Full Smash on Magnets

Buddy Buck

Perfect addition to my promotion giveaway bags! Great quality! 

Great Quality

Lola Bunny Micheaux 

Perfect for what we use them for across the school systems to help students.

Temperature  magnets

Shane Sloan

I love the way the design came out on the magnet ! I’m a little upset they are so small ! I did pick a 2 by 2 square and it was changed to the design of the bunny ! Wish they were bigger 😟

Beautiful design

Christina Barroso

I put my trust in sticker mule that my design would look great and boy did they deliver! The print is crisp, the color is vibrant and the magnets, perfect.  Although thinner than anticipated, the magnetic hold is very strong and difficult to pull off the surface. I hope our team members love them just as much as I do!

10	$9	Special
50	$65
100	$81	Save 38%
200	$110	Save 58%
300	$136	Save 65%
500	$184	Save 72%
1,000	$289	Save 78%
2,000	$475	Save 82%
3,000	$643	Save 84%
5,000	$951	Save 85%
Custom quantity

Custom magnets

Select a size

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Powerful magnets that stick

Vibrant colors that won't fade

Easy ordering, fast shipping

Reviews for custom magnets

Full Smash on Magnets

Great Quality

Temperature magnets

Beautiful design

Better than expected

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