PackGenie can print and manufacturer small, white large letter boxes with a single wall are the ideal size to abide by the Royal Mail's requirements for large letters. All of these huge letter posting boxes adhere to Royal Mail regulations by having a height, or thickness, no greater than 25mm.

Make sure not to overfill this huge letter box packaging since if you do, they might not adhere to these tight requirements. The maximum weight limit for cardboard large letter postal boxes is 750g, and the item's length and breadth cannot be greater than 353mm and 250mm, respectively.

- Royal Mail's large letter specification fits perfectly in the white and brown large letter boxes.

- Passes through a letterbox without becoming scratched or dented

Personalised letterbox boxes can offer several benefits and serve various purposes. Here are a few reasons why people opt for personalised letterbox boxes:

1. Identity and branding: Personalised letterbox boxes allow individuals or businesses to showcase their unique identity and branding. By customising the design, colour, and logo on the box, they can create a distinct and memorable impression on recipients.

2. Professionalism: Personalised letterbox boxes lend a professional touch to correspondence. Whether it's a formal business communication or a personal letter, using customised boxes shows attention to detail and professionalism.

3. Gift giving: Personalised letterbox boxes are popular for gift-giving occasions. By customising the box with the recipient's name, a special message, or relevant imagery, you can add a personal touch that enhances the gift-giving experience.

4. Marketing and promotions: For businesses, personalised letterbox boxes can be an effective marketing tool. By incorporating company logos, slogans, or promotional messages on the box, businesses can increase brand visibility and create a lasting impression on the recipient.

5. Enhanced unboxing experience: Personalised letterbox boxes can make the unboxing experience more enjoyable and memorable. By adding unique designs, patterns, or even interactive elements, recipients can have a sense of excitement and anticipation while opening the box.

6. Differentiation: In a crowded marketplace or in personal relationships, personalised letterbox boxes can help you stand out from the rest. Whether you're sending a resume, a thank-you note, or a special invitation, a personalised box shows that you've put thought and effort into the correspondence.

Ultimately, personalised letterbox boxes offer a creative and customisable way to make a lasting impression, whether it's for personal or professional purposes.

Why Use Large Letter Boxes from Royal Mail?

Using Royal Mail large letter boxes has a wide range of extra advantages. Primarily, by constantly using this packaging design, you can precisely calculate your postage costs because you'll develop regularity in terms of expenses when compared to the various widths and weights that are taken into account when using any other postage technique.

Additionally, compared to mailing bags, these corrugated cardboard boxes have the advantage of being substantially more robust and rigid, which helps to give its contents a higher level of damage resistance. Simply fill the space left by the item, which is smaller than the Royal Mail large letter box, with cushioning to keep it from shifting inside the box and protect it. Available in sizes: 

• C7 (A7): Internal Box Dimensions 101 x 101 x 20mm large letter
• C6 (A6): Internal Box Dimensions 160 x 110 x 20mm large letter
• C5 (A5): Internal Box Dimensions  222 x 160 x 20mm large letter
• C4 (A4): Internal Box Dimensions  322 x 229 x 20mm large letter
• DL: Internal Box Dimensions 216 x 110 x 20mm large letter