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Custom Mailer Boxes: Your Best Shipping Solution
Mailer boxes or postal boxes are one of the best shipping package solutions. They are made of sturdy corrugated material, which provides great protection for your product during transit, as well as being a great sustainable solution, eco-friendly, and recyclable.
There is way more to understanding mailer boxes, their designs and style, what they are made of and how to choose the perfect one for your brand.
What Are Custom Mailer Boxes?
In a nutshell, custom mailer boxes are used in shipping, usually made from corrugated material or cardstock and are tailored for your brand or product. There are numerous styles of postal boxes; however, we will be exploring the most popular styles next.
Popular Mailer Box Styles
When it comes to mailer boxes, there are a lot of types, but the most commonly used ones are self-locking mailer boxes,tuck-top mailers, shippers, roll end tuck top (RETT)and flat mailers.
1. Self-Locking Mailer Boxes

(Self-Locking Mailer Box)
2. Tuck-Top Mailers

(Tuck-Top Mailer)
3. Shipping Mailer Box

(Shipping Mailing Box)
4. Flat Mailers/Book Mailers

(Flat Mailers/Book Mailers)
5. Self-Sealing Adhesive Box

6. Bottle Box
After checking the popular styles for postal boxes, we will get into choosing the best fit for your product in the following.


H2:How to Choose the Perfect Box?
There are a couple of factors to consider when choosing a mailer box for your brand/product. First, we have to select the best measurement, choose the suitable padding, and look at the design.
● Understanding Measurements
When we want to find the perfect fit for our product, we need to be very accurate. Simply because a bigger-sized box could risk damage to the product, and a smaller one can compromise the box structure, and the product could not fit inside at all.
On another note, one has to calculate extra space for paddings, especially if the product is fragile, which we will be exploring next in detail.
Here are the standard mailer box measurements according to the Royal Mail.

● Padding of Mailer Boxes
When you are transporting fragile, breakable or delicate materials, it is recommended to use padding or inserts to add an extra layer of protection and prevent your product from being damaged inside. I will be listing the most used paddings for postal boxes.
1. Foam Liners
This is considered the best option for padding because it is designed specially for the product, snuggles it, and stabilises it, providing ultimate protection.

2. Corrugated Cardboard Inserts
This is also a very good option. The solution is especially helpful if there is more than one product being transferred, and it helps separate them so they don’t collide or get damaged.

3. Packing Peanuts
This is a popular box filling, mainly used for cushioning and void filling to protect products. Interestingly, it also has a lot of other uses, like insulation, gardening, as it increases drainage when placed at the bottom of the plant pot. Additionally, they can be used for arts and crafts and to protect surfaces when placed behind them.

4. Bubble Wrap
I mostly get excited when this filling is used because, personally, I enjoy popping the small bubbles and using it as a stress reliever. Moreover, it is used to protect delicate and fragile items. It can also provide insulation and can be used for arts and crafts. As a padding solution, it is one of the most popular choices for a reason.

5. Packing Paper
This choice is a very useful choice for the environment. It is one of the many uses of recycled paper, and it minimises the use of plastic. A conscious choice for any brand.

6. Air Pillows
One of the solutions to fill any void and also stabilises the product. It is used as a blanket for any product to protect it from damage, as well as protecting the surface from any scratches.
Now that we have covered the padding of the product, we will be exploring the material of the box itself.
● Material of Mailer Boxes
The main material of mailer boxes is corrugated cardboard. There are a couple of things to understand when it comes to corrugated boxes. First of all, they are layered; they can be single-walled, double-walled walled and triple-walled. The design of the layers is a layer of a flat sheet and a flute, which is a wavy material glued in between. The flute varies as well in thickness; there are A, B, C, E, and F flute options.
Secondly, this design of material is great because it provides shock absorption in case of impact and excellent cushioning. Thirdly, it is a great medium for printing any design you provide.
Now, taking into consideration all these elements, it would be very easy to choose the most suitable mailer box for your product.
In case you need more help, we provide a packaging consultation service for you.
To understand more about the printing methods and techniques used, especially for corrugated boxes. I will be explaining them in detail.
What Are the Best Printing Techniques for Corrugated Boxes?
Flexo Printing
This method uses raised flexible plates to print on any material. It is one of the best for large quantities of boxes. Additionally, it is an affordable choice, especially for large quantities.
Litho/Offset Printing
The stamping roller tends to repel water, and when transferred again to another roller, it would then attract the greasy, oily ink to create the final print on the paper.
Digital Printing
It is perfect for urgent deliveries, as it produces the design with minimal setup. One of the best for short runs. It is done by printing the file directly onto the box using the printer. It bypasses the printing plates step in most methods.
Frequently Asked Questions (FAQ)
1. Which Flute Grade Is Best for Apparel or Cosmetics?
The best flute grade for appertel is E-Flute. However, the best flute grade for cosmetics is F-flute.
2. How Strong Are Mailer Boxes for Heavy Items?
The triple-walled mailer boxes are very strong and are capable of holding up to 500kg of weight. They are best for long-distance or international shipping.
3. Are Custom Mailers Eco-Friendly?
Yes, we provide a lot of sustainable options for custom mailer boxes.




