Blue Mailer Box (inside Kraft)
9 x 6.25 x 2 Inch

Size in CM: 22.9 x 15.9 x 5.1Standard Tolerance: plus/minus 5 mm
  • Our 'Royal' blue mailers are cut from German paperboard
  • Machine finished surface ensures high color fidelity & outstanding finish
  • E Flute 2.1 mm wall thickness & 25 ECT construction
  • Great for shipping, as subscription boxes, gift boxes, and e-commerce packaging
  • Sustainably sourced & environmentally responsible
  • Custom printed mailers: Print both outside & inside
₹2,004.23 (Pack Of 50 Incl. GST)
  • Buy 250 for ₹30.57 each and save 10%
  • Buy 500 for ₹28.87 each and save 15%
  • Buy 1000 for ₹26.50 each and save 22%

Select your Proofing option

We inspect your artwork and start production if no problems found. If we find a problem (like a low resolution logo), we will contact you to resolve it.

After inspecting your artwork, we will prepare a PDF and email it to you for approval. Production starts once you approve this proof.

Our blue corrugated cardboard mailing boxes are perfect for any subscription business, as literature mailers, presentation box, luxury packaging, sales kit or great for any gift idea. Clear and brilliant blue color paper ensures aesthetics while ensuring superior performance. Our blue flat mailer boxes are made from 100% secondary fibers and are chlorine and acid free. Sustainably sourced & recyclable. Buy mailer boxes wholesale from Upack. Design online: add your logo and let your brand stand out! Measurements shown are outside dimensions. Internal Dimensions: 216 x 155 x 47 mm (tolerance +/- 1/4")

U-Pack Corrugated Boxes Ply Options & Thickness:

  • 1 Ply 1 MM Thick: 450/350 GSM High Bulk 24 Pt Cardstock (Virgin Grade)
  • 3 Ply 2.1 MM Thick E-Flute Corrugated Cardboard: Lightweight and durable corrugated cardboard material suitable for fragile items.
  • 3 Ply 3.2 MM Thick B-Flute Corrugated Cardboard: Thick and strong corrugated cardboard material suitable for medium to heavier items.
  • 5 Ply 6.1 MM Thick B/C-Flute Corrugated Cardboard: Highly strong corrugated cardboard material suitable for very heavy items.
  • 7 Ply 10 MM Thick B/C-Flute Corrugated Cardboard: Extreme strength cardboard material suitable for heaviest items.

Printed Sides Options:

  • Outside Only - Flexo & Offset
  • Inside Only - Flexo
  • Outside and Inside - Offset+Flexo
  • No Printing (Plain)
Product Code UPTFPS43_BLUE
Colour Royal Blue
Ply / Grade 3 ply
Size 9 x 6.25 x 2 Inch
Box Style Mailer Boxes
Bundle Qty. 50 / pack
Note Custom printing & sizes available. Call for details.


Quality Carton and Cardboard Boxes from U-Pack: Are you a small business owner unable to place bulk packaging orders due to storage limitations? Or are you relocating and requiring premium Ecommerce boxes to secure your cherished possessions? U-Pack is your one-stop solution. We offer an extensive range of sizes of packing boxes, from small cube boxes and regular-sized cartons to extra-long boxes for oddly shaped items.


With their high strength-to-weight ratio, our boxes made with imported kraft liners offer versatility and cost-effectiveness, meeting both business and home needs. Whether you're searching for packaging boxes for office use, commercial purposes, or personal use, U-Pack has you covered. We provide delivery throughout India, serving as a comprehensive online solution for your packaging and shipping needs.


U-Pack also offers its clients high-quality premier design, and luxury packaging for personalized gift boxes in all packing materials, from wood to carton board to metals and plastics.

Discover the Best Range of Packaging Materials in India: U-Pack offers a wide selection of corrugated boxes in different styles and sizes. Whether you need long boxes, flat boxes, festive boxes, office boxes, or cube boxes, we have you covered. Buy in bulk and take advantage of our customization services to brand your packaging with your logo and design.

Frequently Asked Questions

Q: What are the steps to customize and print my artwork?

  • Select the "Customize" feature from the product menu, if available for your chosen product.
  • Avail of the opportunity to print Single Colour Artwork on all surfaces of the box. The minimum order quantity for this service is just 100 boxes and prices start from Rs. 899 only without any die charges!
  • You also have the choice to print Multi Colour Artwork (offset and or litho lamination) on all sides of the box, complete with a Coating. For this, the minimum order quantity starts at 1000 boxes.
  • To submit your artwork, click on the Upload button and adjust the graphics as needed on each side of the box. U-Pack is the only company in India to offer 3D online design tool with dynamic visualisation.
  • If you don't possess any artwork, simply forward your logo to us and we will create the artwork on your behalf.
  • If you lack a logo, just provide your brand name and we'll design a logo that reflects your brand.
  • We offer complimentary services for design, prepress, or any other one-time charges.
  • Our dedicated design team will collaborate with you to create a design and then share it with you via email.
  • We're happy to edit the design until you're completely satisfied with it.
  • The entire process, based on your requirements, spans between 2-5 days.
  • After finalizing the artwork, we require 1-2 days to print and dispatch the boxes for Single Colour Artwork.
  • In the case of Multi Colour Artwork, after finalization, it typically takes 5-14 days for us to print and dispatch the boxes.
  • We do not impose any charges for Prepress services like Designing, Cylinder, plate making, or Films. We also do not charge for punch, die-making.
  • There are no hidden one-time costs involved.

Q: Why should I choose U-Pack for my purchase?

A: U-Pack is the only provider of real 50BF International Standard Corrugated Boxes, Mailers, and Mailing Boxes online across India. As the direct manufacturer, we guarantee the best price, sourced straight from our ISO Certified Factory. We prioritize customer satisfaction, providing easy returns and 100 % refunds. U-Pack is the topmost online supplier of Corrugated Boxes in India. The company manufactures and ships over 1 lakh corrugated boxes from its ISO-certified manufacturing units located in Mumbai. U-Pack also delivers them to over 6000 PIN Codes across India. Check out our thousands of 5-star reviews and a loyal customer base of over 15000 happy customers.

Q: Can I buy a single mailing box?

A: Yes, you can order a sample mailing box. Click the link in the footer for samples.

Q: Can I assemble the mailing box myself?

A: Assembling a mailer box is quite simple. The box comes in a flat form and is pre-scored for effortless assembly. Just follow these steps to prepare your custom box:

  • Fold the pre-scored lines inward.
  • Lift the front and back flaps.
  • Raise the side walls of the box, tuck them in, and click into place.
  • The mailer box is now assembled and ready to be used.

Q: How will my boxes be shipped?

A: All boxes are flat and unassembled. We take great care in packing the boxes and ensuring the corners are protected during transit.

Q: When will I receive my mailing boxes?

A: We ensure rapid processing, with 99% of orders being dispatched within 48 hours and a delivery window of 1-4 days across India. We can complete production in 1 business day if you need an expedited service.

Q: Can I ship my mailer box without using any other extra packaging?

A: We use 50 BF paper for our boxes, which are highly strong and durable for shipping. For custom-printed boxes or high-end white mailers, we suggest adding an extra cardboard box to enhance the unboxing experience.

Q: What will the finish of the mailer boxes look like?

A: The final look of your boxes depends on the type of paper you pick. Our Kraft liners are premium uncoated fiber grade giving a natural rustic look with a slight sheen. Our White paper is pure fiber slightly coated export quality satin feel. Our black paper is imported from Koehler, Germany, and has a linen content giving a luxury finish. Other color options are acid-free papers giving a clean high fidelity tactile feel. Flexo on these gives a matte finish and offset (glossy ink) will provide a brighter luster due to the high-gloss UV ink that's used.

Q: Can I order a box type other than cartons, shippers, and flat mailing boxes?

A: We are a manufacturer with house rotary die cutting and full printing infrastructure. We can quickly make any custom mailing box and carton with any kind of custom printing, embossing, lamination, and window patching. Call us at (022) 4896 4040 to get started

Q: Can I print on the inside and outside of the box?

A: Yes, you can print both the outside and inside of your mailer boxes online using our 3D design tool. Select Add 'Inside Print' on the design module and double-click on each side to upload your artwork files and logo.

Q: How can I get a keyline diagram?

A: Please email us or call us at (022) 4896 4040 and we will send you the dieline free of charge.

More Information
Part No. UPTFPS43_Blue
Country of Manufacture India
Length 9
Width 6.25
Height 2
Type 3 ply
Color Royal Blue