Custom mailer boxes made simple.
Durable, branded, and designed to impress. Create eco‑friendly mailer boxes that protect products and elevate unboxing - with no minimums or fast production times.
Custom mailer boxes (often called roll‑end tuck‑top (RETT)) are sturdy, self‑locking corrugated boxes designed for an elevated unboxing experience and reliable shipping. Their hinged lid, dust flaps, and double‑thick walls make them perfect for subscription kits, DTC shipments, PR influencer boxes, and premium gifting. Compared to standard shipping boxes, mailers offer a more polished presentation while still withstanding carrier networks. Thick walls make them perfect for subscription kits, DTC shipments, PR influencer boxes, and premium gifting. Compared with standard shipping boxes, mailers offer a more polished presentation while still withstanding parcel networks.
Great for: beauty & skincare kits, apparel & accessories, tech merch, sampling programs, welcome kits, and holiday gifting.
Whether you’re designing your first mailer box or giving an existing one a refresh, DIYpack makes custom packaging easy and flexible. Use our online Design Studio to build your box from scratch, or download the dieline and design in your preferred tool — either way, you’re in full creative control.
In the Design Studio, you can upload artwork, add your logo, fine-tune colors to match your brand guidelines (HEX, CMYK, or RGB), and preview your mailer box in a realistic 3D view before ordering. Choose from kraft, white, or premium white finishes to create packaging that feels true to your brand.
At DIYpack, custom packaging should be accessible at any stage of growth. With no minimums and easy-to-use tools, emerging brands get enterprise-level polish — without big-box commitments.
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 customize templates in minutes.
No tooling or long setup times.
Local production you can count on.
Start with a small run to validate your design, then reorder or scale as sales grow. 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).
Clean, gift‑like reveal; protects contents in transit
Great stacking strength; holds up in parcel shipping
Right‑size your packaging to cut DIM weight and void fill
Crisp detail outside; optional inside print for a full‑brand experience
Kraft (natural brown), White (uncoated matte), Premium White (gloss)
Up to 99% recycled content; SFI®‑certified materials; water‑based inks available
Smarter packaging means less waste and more impact. Our mailer box design focuses on sustainability without sacrificing performance. Learn more on our Sustainability page.
Whether you’re launching or refreshing packaging, DIYPack delivers:
Instant pricing and transparent costs
Estimated shipping prices
Fast lead times with 5-7 business day production
Design Studio for easy artwork customization and 3D previewing to brand boxes instantly
Made by a direct manufacturer – no middlemen markups
Sustainable materials that do not sacrifice style
E-flute or B-flute corrugated board (flute type is automatically selected based on the box size you enter)
Full bleed exterior; optional interior print
Optimized for parcel carriers; choose custom sizing to reduce DIM
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.