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Order summary:
Custom Mailer Boxes
Quantity: x5 | Box Size: 100 x 100 x 22mm | Material: White Coated E-Flute | Printed Sides: Single Sided | Finishing Types: Cut to Shape |
Artwork Technical Check: Essential - FREE
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Product description
Reinvent shipping experiences with our custom Mailer Boxes, where each delivery becomes an opportunity to impress. Whether handling your Etsy shipping, delivering gifts or sending promotional items, these boxes are built to make a statement from the outside.
Available in three sizes—and made from durable white coated E-flute, our parcel boxes are designed to both look stylish and withstand the journey. Choose single sided printing to personalise your letterbox packaging and ensure your messaging shines the moment it arrives at your customer's doorstep.
Perfect for businesses looking to make an impact with their deliveries, our mailer boxes blend practicality with style, creating a lasting impression long after the box has been opened. Make your personalised postal boxes not just functional but unforgettable.
Etsy deliveries, parcel shipping, promotional giveaways, custom subscription boxes and more.
Top tip
Take your packaging to the next level by printing on the outside of your custom mailer boxes. This creates a seamless, all-around branded experience that surprises and impresses your customers from the moment they open the box.
Looking for more ways to elevate your packaging? Discover our wide range of custom packaging solutions.
Design guidelines
To make artwork setup simple, download the relevant template from the Production templates section above. Follow the instructions provided and remember to remove the 'Guide' layer before exporting your artwork as a PDF.
For the best printing results, ensure your artwork and images are in CMYK. If you use RGB, Pantone or spot colours, these will be converted to CMYK during production, which may affect how your colours appear in print.
To avoid font issues, make sure all fonts are embedded or converted to outlines before exporting your PDF. For readability, we recommend using a minimum font size of 10pt.
For the best print quality, aim for images between 300dpi and 450dpi at their final print size. Lower resolutions may appear blurry or pixelated, while higher resolutions can increase file sizes. Check product template for any specific requirements.
To avoid alignment issues during cutting, include crop marks with a 10mm offset and document bleed when exporting your artwork as a PDF. Refer to the relevant product template for the required bleed specifications, as these vary by product.
All artwork must be supplied as a print ready PDF. We recommend exporting in Adobe PDF (Print) format, ideally using the PDF/X 1a:2001 standard.
Need more help preparing your artwork Explore our support guides for further guidance.
Designing with Canva
We offer free Canva templates for many of our products, complete with the correct dimensions, bleed and safe zones. Where available, you'll find the Canva template in the Production templates section above, ready to open and personalise.
Once your design is complete, download it as a PDF Print file and return to our website to place your order and upload your artwork. Remember to remove any guide layers before exporting.
Need help getting started? Read our Canva template guide or explore our wider collection of Canva templates for other products.
Canva uses RGB colour mode by default, which is designed for screens rather than print. For the best printing results, make sure you select CMYK when exporting your artwork. Converting from RGB to CMYK can cause slight colour shifts, so always check your exported PDF carefully before uploading to avoid unexpected results.
Need help with colours? Read our Canva colour guide.
Use fonts of at least 10pt to maintain legibility and keep important text within the safe zone. Use images at 300dpi or higher at their final size to avoid blurry or pixelated results.
Need help with image quality? Read our artwork resolution guide or watch our YouTube tutorial on how to export Canva designs for print.
Extend backgrounds, colours and images into the bleed area to avoid unwanted white edges after trimming. Keep important text, logos and design elements within the safe zone, and follow the bleed requirements for your chosen product.
Need help setting up bleed? Read our Canva bleed setup guide.
When exporting your finished design from Canva, select PDF Print and enable 'Crop Marks and Bleed'. This ensures your artwork includes the necessary bleed for printing. Remember to remove any template guides before downloading your file.
Need help exporting your artwork? Explore our Canva Hub for further guidance, or watch our tutorial below.
Custom mailer boxes are sturdy, packaging solutions made from corrugated cardboard, tailored to fit specific branding needs. They feature a self-locking mechanism for easy assembly and come in various sizes. These boxes are perfect for shipping merchandise and gifts, providing protection during transit to ensure they arrive in excellent condition.
100 x 100 x 22mm: This small postal box meets Royal Mail's large letter size requirements, perfect for compact items.
255 x 168 x 22mm: This medium postal box meets Royal Mail's large letter size requirements, suitable for medium sized items.
600 x 182 x 35mm: This large postal box meetings Royal Mail's medium parcel size requirements, well-suited for larger items.
All of the aforementioned sizes are designed to comply with Royal Mail size requirements; however it is important to remember that letterbox sizes can vary on individual doors, so be sure to keep this in mind when choosing a specific size.
E-flute: This lightweight reinforced board features a smooth, bright white surface, making it an ideal choice for printed postal boxes.
Custom postal boxes are supplied flat for easy self-assembly. To assemble, begin by folding along the pre-scored lines on the cardboard. Next, insert the interlocking tabs into their corresponding slots to secure the box’s structure. Once the tabs are locked in place, fold the top and bottom flaps over and tuck them in to close the box. Make sure all edges are aligned properly and the box is securely sealed before use.
Yes, our postal boxes are recyclable since they are constructed from corrugated cardboard. To recycle them properly, remove any contents, clean off any residue, and flatten the box. Always check local recycling guidelines, as practices may vary by region.
Our budget business cards measure 85 × 55mm, a standard UK business card size that fits neatly into most wallets and cardholders. Choose landscape or portrait orientation to suit your design.
The turnaround time for personalised postal boxes depends on your chosen product specification and finishing options. For faster delivery, we offer express production upgrades at an additional cost. To ensure your order is delivered on time, it is important we receive your artwork by the cut-off time indicated on both the product page and basket.
Please note: If your file is submitted after the cut-off time or if corrected artwork isn't provided before the next cut-off time following rejection, it will delay delivery by one working day.
We offer free standard delivery, with optional upgrades available for expedited service, including pre-10:30 AM and pre-12:00 PM for an additional cost.
Yes, we offer international delivery. Contact our Bespoke team for a shipping quote.
Yes, we can arrange split deliveries. Contact our Bespoke team to let us know how you'd like your order sent.
Uploading custom mailer box artwork is a breeze. After placing your order, click the upload button on the confirmation page. You can also upload your artwork through the Orders tab of "My Account".
Most orders are sent in boxes. For larger quantities, we may secure your order on a pallet (kerbside delivery). If your location doesn’t have tail-lift access, please contact us after placing your order so we can help arrange the best delivery option. Be sure to have your order number to hand.
Product description
Reinvent shipping experiences with our custom Mailer Boxes, where each delivery becomes an opportunity to impress. Whether handling your Etsy shipping, delivering gifts or sending promotional items, these boxes are built to make a statement from the outside.
Available in three sizes—and made from durable white coated E-flute, our parcel boxes are designed to both look stylish and withstand the journey. Choose single sided printing to personalise your letterbox packaging and ensure your messaging shines the moment it arrives at your customer's doorstep.
Perfect for businesses looking to make an impact with their deliveries, our mailer boxes blend practicality with style, creating a lasting impression long after the box has been opened. Make your personalised postal boxes not just functional but unforgettable.
Etsy deliveries, parcel shipping, promotional giveaways, custom subscription boxes and more.
Top tip
Take your packaging to the next level by printing on the outside of your custom mailer boxes. This creates a seamless, all-around branded experience that surprises and impresses your customers from the moment they open the box.
Looking for more ways to elevate your packaging? Discover our wide range of custom packaging solutions.
Design guidelines
To make artwork setup simple, download the relevant template from the Production templates section above. Follow the instructions provided and remember to remove the 'Guide' layer before exporting your artwork as a PDF.
For the best printing results, ensure your artwork and images are in CMYK. If you use RGB, Pantone or spot colours, these will be converted to CMYK during production, which may affect how your colours appear in print.
To avoid font issues, make sure all fonts are embedded or converted to outlines before exporting your PDF. For readability, we recommend using a minimum font size of 10pt.
For the best print quality, aim for images between 300dpi and 450dpi at their final print size. Lower resolutions may appear blurry or pixelated, while higher resolutions can increase file sizes. Check product template for any specific requirements.
To avoid alignment issues during cutting, include crop marks with a 10mm offset and document bleed when exporting your artwork as a PDF. Refer to the relevant product template for the required bleed specifications, as these vary by product.
All artwork must be supplied as a print ready PDF. We recommend exporting in Adobe PDF (Print) format, ideally using the PDF/X 1a:2001 standard.
Need more help preparing your artwork Explore our support guides for further guidance.
Designing with Canva
We offer free Canva templates for many of our products, complete with the correct dimensions, bleed and safe zones. Where available, you'll find the Canva template in the Production templates section above, ready to open and personalise.
Once your design is complete, download it as a PDF Print file and return to our website to place your order and upload your artwork. Remember to remove any guide layers before exporting.
Need help getting started? Read our Canva template guide or explore our wider collection of Canva templates for other products.
Canva uses RGB colour mode by default, which is designed for screens rather than print. For the best printing results, make sure you select CMYK when exporting your artwork. Converting from RGB to CMYK can cause slight colour shifts, so always check your exported PDF carefully before uploading to avoid unexpected results.
Need help with colours? Read our Canva colour guide.
Use fonts of at least 10pt to maintain legibility and keep important text within the safe zone. Use images at 300dpi or higher at their final size to avoid blurry or pixelated results.
Need help with image quality? Read our artwork resolution guide or watch our YouTube tutorial on how to export Canva designs for print.
Extend backgrounds, colours and images into the bleed area to avoid unwanted white edges after trimming. Keep important text, logos and design elements within the safe zone, and follow the bleed requirements for your chosen product.
Need help setting up bleed? Read our Canva bleed setup guide.
When exporting your finished design from Canva, select PDF Print and enable 'Crop Marks and Bleed'. This ensures your artwork includes the necessary bleed for printing. Remember to remove any template guides before downloading your file.
Need help exporting your artwork? Explore our Canva Hub for further guidance, or watch our tutorial below.
Custom mailer boxes are sturdy, packaging solutions made from corrugated cardboard, tailored to fit specific branding needs. They feature a self-locking mechanism for easy assembly and come in various sizes. These boxes are perfect for shipping merchandise and gifts, providing protection during transit to ensure they arrive in excellent condition.
100 x 100 x 22mm: This small postal box meets Royal Mail's large letter size requirements, perfect for compact items.
255 x 168 x 22mm: This medium postal box meets Royal Mail's large letter size requirements, suitable for medium sized items.
600 x 182 x 35mm: This large postal box meetings Royal Mail's medium parcel size requirements, well-suited for larger items.
All of the aforementioned sizes are designed to comply with Royal Mail size requirements; however it is important to remember that letterbox sizes can vary on individual doors, so be sure to keep this in mind when choosing a specific size.
E-flute: This lightweight reinforced board features a smooth, bright white surface, making it an ideal choice for printed postal boxes.
Custom postal boxes are supplied flat for easy self-assembly. To assemble, begin by folding along the pre-scored lines on the cardboard. Next, insert the interlocking tabs into their corresponding slots to secure the box’s structure. Once the tabs are locked in place, fold the top and bottom flaps over and tuck them in to close the box. Make sure all edges are aligned properly and the box is securely sealed before use.
Yes, our postal boxes are recyclable since they are constructed from corrugated cardboard. To recycle them properly, remove any contents, clean off any residue, and flatten the box. Always check local recycling guidelines, as practices may vary by region.
Our budget business cards measure 85 × 55mm, a standard UK business card size that fits neatly into most wallets and cardholders. Choose landscape or portrait orientation to suit your design.
The turnaround time for personalised postal boxes depends on your chosen product specification and finishing options. For faster delivery, we offer express production upgrades at an additional cost. To ensure your order is delivered on time, it is important we receive your artwork by the cut-off time indicated on both the product page and basket.
Please note: If your file is submitted after the cut-off time or if corrected artwork isn't provided before the next cut-off time following rejection, it will delay delivery by one working day.
We offer free standard delivery, with optional upgrades available for expedited service, including pre-10:30 AM and pre-12:00 PM for an additional cost.
Yes, we offer international delivery. Contact our Bespoke team for a shipping quote.
Yes, we can arrange split deliveries. Contact our Bespoke team to let us know how you'd like your order sent.
Uploading custom mailer box artwork is a breeze. After placing your order, click the upload button on the confirmation page. You can also upload your artwork through the Orders tab of "My Account".
Most orders are sent in boxes. For larger quantities, we may secure your order on a pallet (kerbside delivery). If your location doesn’t have tail-lift access, please contact us after placing your order so we can help arrange the best delivery option. Be sure to have your order number to hand.
