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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
Unparalleled knowledge,See what our customers say about Custom Mailer Boxes
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, we recommend downloading the relevant template from the 'Product Templates' section above. Don’t forget to follow the template instructions and delete the 'guide' layer before exporting your design to a PDF.
For best printing results, ensure your artwork and images are CMYK. If you use RGB, Pantone or spot colours in any element of your artwork, we will automatically convert them to CMYK which may change your colour profile.
To eliminate any font issues, make sure all fonts are ‘embedded’ or ‘converted to outlines’ before creating your PDF print file. To ensure legibility, we recommend using a minimum font size of 10pt.
For optimal image print quality, ensure all images are 300dpi to 450dpi. Anything lower than 300dpi will give poor image quality. Images higher than 450dpi will result in high file sizes and may cause longer upload times.
To avoid alignment issues during cutting, be sure to include ‘crop marks’ (offset 10mm) and ‘document bleed’ when exporting your artwork file to PDF. Refer to our product templates for the required bleed specifications.
To meet our print requirements, ensure your file is exported in Adobe PDF (Print) format, ideally as PDF/X-1a: 2001.
Need further guidance? Our help centre is here to provide the answers.
How to print with Canva
We provide free Canva templates for many of our products to make artwork setup quick and print ready. If this product displays a Canva icon above, click it to open the correct template in Canva. Each template includes the correct dimensions, bleed and safe zones to help you set up your artwork correctly from the start.
Once your design is complete, download your artwork and return here to place your order.
If this product does not currently include a Canva template, you can still browse our full collection of Canva-compatible templates to find suitable alternatives.
When opening a template, it will launch in a new tab with all guides preloaded for you. Remember to remove any template guide layers before exporting your final artwork.
Need help getting started with WTTB Canva templates? Read the WTTB Canva template guide or watch our YouTube tutorial on how to use WTTB Canva templates.
For the most accurate print results, always set your design to CMYK colour mode where possible. Canva designs are usually created in RGB, which may cause slight colour shifts when converted for print.
We recommend checking colours carefully before exporting to help avoid unexpected results in your final print.
Need help setting up colours correctly? Read the print colour guide or watch our YouTube tutorial on how to get accurate print colours in Canva.
Use Canva fonts at a minimum size of 10pt to help maintain legibility when printed. Keep all important text within the safe area to prevent anything being trimmed during production.
For images, always use high resolution files at 300 DPI or higher. Low resolution images can appear blurry or pixelated once printed.
Need help preparing artwork for high quality print? Read our artwork resolution guide or watch our YouTube tutorial on how to export Canva designs for high quality print.
Extend any backgrounds, colours or images fully into the bleed area to avoid unwanted white edges after trimming. Keep important text, logos and key design elements safely inside the designated safe zone. Correct bleed setup is essential for achieving a professional print finish.
Need help setting up bleed correctly? Read our bleed setup guide or watch our YouTube tutorial on how to set up bleed in Canva for print ready designs.
When exporting from Canva, choose PDF Print as your file format and ensure 'Crop Marks and Bleed' is selected before downloading your artwork.
Once your artwork has been finalised, upload the completed PDF when placing your order with WTTB.
Need help exporting your artwork? Visit our Canva Hub for step by step guides on creating and exporting print ready designs in Canva, or watch our YouTube tutorial on how to export Canva designs for print with WTTB below.
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, we recommend downloading the relevant template from the 'Product Templates' section above. Don’t forget to follow the template instructions and delete the 'guide' layer before exporting your design to a PDF.
For best printing results, ensure your artwork and images are CMYK. If you use RGB, Pantone or spot colours in any element of your artwork, we will automatically convert them to CMYK which may change your colour profile.
To eliminate any font issues, make sure all fonts are ‘embedded’ or ‘converted to outlines’ before creating your PDF print file. To ensure legibility, we recommend using a minimum font size of 10pt.
For optimal image print quality, ensure all images are 300dpi to 450dpi. Anything lower than 300dpi will give poor image quality. Images higher than 450dpi will result in high file sizes and may cause longer upload times.
To avoid alignment issues during cutting, be sure to include ‘crop marks’ (offset 10mm) and ‘document bleed’ when exporting your artwork file to PDF. Refer to our product templates for the required bleed specifications.
To meet our print requirements, ensure your file is exported in Adobe PDF (Print) format, ideally as PDF/X-1a: 2001.
Need further guidance? Our help centre is here to provide the answers.
How to print with Canva
We provide free Canva templates for many of our products to make artwork setup quick and print ready. If this product displays a Canva icon above, click it to open the correct template in Canva. Each template includes the correct dimensions, bleed and safe zones to help you set up your artwork correctly from the start.
Once your design is complete, download your artwork and return here to place your order.
If this product does not currently include a Canva template, you can still browse our full collection of Canva-compatible templates to find suitable alternatives.
When opening a template, it will launch in a new tab with all guides preloaded for you. Remember to remove any template guide layers before exporting your final artwork.
Need help getting started with WTTB Canva templates? Read the WTTB Canva template guide or watch our YouTube tutorial on how to use WTTB Canva templates.
For the most accurate print results, always set your design to CMYK colour mode where possible. Canva designs are usually created in RGB, which may cause slight colour shifts when converted for print.
We recommend checking colours carefully before exporting to help avoid unexpected results in your final print.
Need help setting up colours correctly? Read the print colour guide or watch our YouTube tutorial on how to get accurate print colours in Canva.
Use Canva fonts at a minimum size of 10pt to help maintain legibility when printed. Keep all important text within the safe area to prevent anything being trimmed during production.
For images, always use high resolution files at 300 DPI or higher. Low resolution images can appear blurry or pixelated once printed.
Need help preparing artwork for high quality print? Read our artwork resolution guide or watch our YouTube tutorial on how to export Canva designs for high quality print.
Extend any backgrounds, colours or images fully into the bleed area to avoid unwanted white edges after trimming. Keep important text, logos and key design elements safely inside the designated safe zone. Correct bleed setup is essential for achieving a professional print finish.
Need help setting up bleed correctly? Read our bleed setup guide or watch our YouTube tutorial on how to set up bleed in Canva for print ready designs.
When exporting from Canva, choose PDF Print as your file format and ensure 'Crop Marks and Bleed' is selected before downloading your artwork.
Once your artwork has been finalised, upload the completed PDF when placing your order with WTTB.
Need help exporting your artwork? Visit our Canva Hub for step by step guides on creating and exporting print ready designs in Canva, or watch our YouTube tutorial on how to export Canva designs for print with WTTB 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.
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.
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.
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.
