Sturdy, stylish, and made to protect.
Create eco-friendly custom square tube boxes that showcase and safeguard your products - perfect for long items, specialty items, and promotional packaging..
Square tube boxes are long, four-sided cartons designed for slim or specialty items. Unlike round corrugated tubes, these boxes feature flat sides, making them easy to brand, stack, and ship. Their durable corrugated construction ensures products stay secure during storage, shipping, or on the store shelf.
Great for: posters, blueprints, artwork, rolled apparel, specialty retail items, promotional kits, crafts, and gift packaging.
At DIYPack, we make custom square tube boxes and square mailing tubes accessible for every brand size and budget. Whether you’re shipping delicate artwork or designing premium retail packaging, we give you the tools to create professional grade packaging with ease:
Enter exact inside dimensions to fit your product.
Order only what you need, the more you buy the more you save.
Orders ship in 5 – 7 business days.
Upload print ready art or build your design in our studio.
High-quality graphics, no plate fees.
Dependable quality and service.
Use square tube boxes instead of round corrugated tubes when you want a stackable, more shipping friendly option that also maximizes print space. With our Sample Program, you can order 1, and when you're ready to place your full order of 100 boxes or more, we'll give you a credit equal to your Sample Box cost ($50–$60 value).
Stacks easily for storage and shipping
Helps protect fragile items
Right-sized for posters, apparel, or specialty products
Full coverage, photo quality graphics
Kraft (natural brown), White (uncoated matte), Premium White (gloss)
Up to 99% recycled content; SFI®‑certified materials; water‑based inks
Smart tube packaging for your brand and the planet. Learn more on our Sustainability page.
We make it easy to elevate your packaging:
Instant pricing with no surprises
Estimated shipping prices
Reliable production - 5-7 business days
Design Studio for quick customization and 3D preview
Direct manufacturer – better pricing and speed
Sustainable materials with standout print finishes
E-flute or B-flute corrugated board — we automatically choose the flute size based on your box dimensions
High quality print exterior; optional inside print
Ships flat. There is no glue needed for assembly
Square construction prevents rolling and reduces DIM weight compared to round tubes
Reviews
from customers
"I cannot say enough wonderful things about this packaging company and their incredible team. From start to finish, they truly went above and beyond to support our holiday boxes, and the experience exceeded our expectations in every way. Their attention to detail, responsiveness, and willingness to problem-solve made a huge difference during a very busy holiday season. They treated our project with care and urgency, as if it were their own, and ensured everything was delivered beautifully and on time. The final product was not only high-quality and thoughtfully executed, but it also reflected the heart and intention behind our mission. We are deeply grateful for their partnership and would recommend them without hesitation to any organization looking for a reliable, collaborative, and exceptional packaging partner. Thank you for helping us bring something so meaningful to life."
Kelli Hadwiger
Google Review
"10/10 experience. Ordered some custom boxes and they came out perfect!!! Would definitely work with DIYPack again :D"
Tommy Lionelli
"Very easy to customize any size box. I absolutely loved it."
Andrea Martinez
"I recently received a package from a friend using this company and I felt guilty throwing it away, so I didn't. I will keep this wonderful box with me until the end of days."
Leo Wong
Get to Know Your Packaging
Want to make sure your packaging looks exactly the way you imagined? Order a Sample Box and see your design in real life before placing a larger run.
Quick side‑by‑side comparison of three common corrugated packaging formats.
Common questions about custom mailer boxes.