Custom Thank You Card
Custom Flat Card
Custom Flat Card Size
Custom Flat Card Material
Custom Branded Flat Card
Custom Thank You Card
Custom Flat Card
Custom Flat Card Size
Custom Flat Card Material
Custom Branded Flat Card
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5.0 ★★★★★
All reviews


Custom Printed Flat Cards are an excellent way to power up your customer's unboxing experience. Our diverse selection of sturdy and elegant materials makes it easy to design your cards, allowing your customers to see what you are announcing and visit your store or website to take advantage of a sale or event.

We offer over 23 sizes from 2" x 4" to 9" x 12" that can be used as inserts into packages and orders. Keep clients updated, offer coupons, or just use them as a simple way to send a personalized message to customers.

Popular Business Card Sizes:
  • 3.5 x 2" US Standard Business Card
  • 3.5 x 1.75" Slim Business Card
  • 3.35 x 2.17" European (55x85mm)
Popular Thank you card sizes:
  • 3 x 5" Small
  • 4 x 6" Medium
  • 5 x 7" Large



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Custom Flat Cards

Sustainable packaging

Say more with custom flat cards. Use for branding, promotion, or expressing gratitude. Store inside packages to leave customers a surprise message. Available in lots of sizes.

Custom printed packaging

Fully customizable, with your logo/design.
$ all
$ each
Premium White
Outside only
Ships in 10-20 business days

Design your packaging. Or let someone design it for you.

PackM makes it easy for you to achieve your branding goals. We understand how a well-designed packaging makes an effective tool to develop brand awareness with your customers. You can choose one of our 3 ways to create awesome packaging.
Design your packaging
Design here on
The fastest and easiest way to design a great product online is with PackM’s Design Editor. You can use our online design editor for free. Just select the “Design Now” option on the file section and start enhancing your design.
Design packaging in your favorite app
Design in your favorite tool
If you are a graphic designer or you know how to use graphic design software you can download the dieline template from the product page and then upload your artwork file in PDF.
Packaging design help
Ask PackM for Design help
If you are not a designer, a great way to customize your product is to take advantage of our free graphic design assistance. Don’t hesitate to reach out to a PackM representative via chat.

Pair with:

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Reviews by real people running real businesses.

Play Learn Repeat
Play Learn Repeat
Jason C.
Sample Box

PackM ensured our design was accurate and the colors were correct. The box was delivered within the specified time and was packaged inside a sturdy box (better than off the shelf or Amazon boxes). Thank you for the quick responses to our inquiries as well. Great product!

Custom Mailer Boxes
Kay L.
Happy customer

High-quality printing, small minimum quantities, and fast turnaround — so glad I’ve found PackM!

Custom Mailer Boxes
Dope Munchie Crew
Dope Munchie Crew
Dianne M.
Six stars!

Your team provided me and my business with an amazing product! The boxes and tissue paper are perfect, the quality is impressive, and the look is beautiful and professional. I definitely am planning on ordering again and I will certainly recommend you to others. Thanks so much for your excellent customer service and beautiful products.

Custom Product Boxes
Butler Business Systems
Butler Business Systems
Amy M.
Extremely happy!

My boxes are high quality and they look great. I have ordered from them a few times and will be placing another order. It makes our business look very professional.

Custom Shipping Boxes
Envy Fox Couture
Envy Fox Couture
Nikki F.

You guys were perfect! Everything from the customer service, product design, and assistance to the shipping speed, was amazing. I’m truly glad I decided to use you guys. I will be ordering again soon!

Custom Mailer Boxes

Can't decide? Order a sample.

Quantities 1 and 2 are shipped within 4-5 business days, so you can see the sample of your box fast.

Frequently Asked Questions

Can I get a discount if I order more?

Yes, you can. The unit price (price of one box) decreases as you order more. PackM is happy to pass on savings to customers when it costs us less to produce.

How can I pay for my order?

PackM accepts various payment methods, including Visa, MasterCard, American Express, and popular payment cards. We use a secure payment processor called Stripe and do not store customer credit card data on our servers. Stripe's advanced technology allows customers to save their payment information for future use. If you need a payment method that we don't currently offer, please contact our customer service team.

Will PackM check my files?

Yes, we will. PackM checks 100% of customer files, both those designed online and those uploaded, to ensure they are print-ready. Our packaging prepress experts carefully inspect every file, conducting over 50 different checks. If there are any issues that need adjustment to meet our production requirements, we can make micro-adjustments. If we encounter a problem that we can't fix, such as low-resolution images or missing font files, we will contact you to discuss how to fix the artwork. You can trust that your box will be printed with excellent quality.

Can I use a file created by someone else?

Absolutely. If you have a complete artwork file that is print-ready, feel free to upload it. PackM carefully checks all files, and if anything is off, we will reach out to you.

Can PackM help me with a design?

Yes, we can. PackM is happy to assist customers with packaging design. Let us know your needs, and we will provide our help and expertise.

Where are the products printed?

All of PackM's products are produced in the United States. To minimize shipping costs, we produce boxes at the facility closest to the shipping destination.

Express Yourself With Flat Cards

Custom flat cards let you engage customers right before they take products off the packaging. Use this opportunity to provide additional information, promote other products, or just talk about your business. 

They also work as warranty cards. If you have instructions you’d like to pass on, you can print them on cards. 

Some business owners print QR codes or URLs on flat cards to redirect users to a website or social media account. Customers can then access content designed to engage them.

Are you running a restaurant? Then why not use flat cards to showcase some of your other food items? Real estate agents can use them when showing listings. Graphic designers and photographers hand them out to potential clients.

There’s so much you can do with custom flat cards. It’s up to you how you want to incorporate them into your marketing strategy.

Let Customers Know You Appreciate Their Business

The most popular use case for cards is for sending thank you messages. 

Thank you cards are important because businesses need to show their gratitude. It doesn’t matter how big or small a purchase is, saying thanks is the classy thing to do. Packaging accessories can make all the difference in the world for online and retail businesses.

One nice thing about custom flat cards is that you can print them to your exact specifications. So whether you’re using custom boxes or gift bags, they’ll fit nicely in the packaging.

Not only are custom cards good for branding, but they can also lead to repeat business down the road.

Make Flat Cards Look How You Want Them To

We offer different customization options to help you get the most out of your flat cards.

Choose from one of the many sizes available. It ranges from 2” x 4” up to 9” x 12”.

You also get to choose what material you want us to print your design on. The 100 lb. recycled matte cover is the thinnest option. If you want something sturdier, go with either 14 pt. gloss or uncoated cover.

And by the way, you can print on one or both sides of the card. We suggest printing on both sides to maximize all that space.

Make Beautiful Flat Card Designs

PackM has all the resources you’ll need to create the best flat card designs for your company. 

Our Design Tool lets users upload images like logos and backgrounds to create designs that are uniquely their own. They’re able to move them around and position them as needed. There’s even a live preview so you’ll know what your design would look like on the card.

You can call or message us if you need some help. Talk to our representatives about our free design assistance for more information.

We also have a Design Hub where you’ll find designs that our customers made for their businesses. It’s a great source of inspiration.