What are the Standard Mailer Box Sizes? Read This Blog!

The number of digital buyers has increased over the past few years. And the success of every e-commerce brand depends on how safely they deliver products to their customers. Brands must invest in custom mailer boxes to win more satisfied customers. A mailer box is a self-locking corrugated packaging box designed for shipping, subscription products, retail packaging, and promotional kits. These boxes offer durability, branding opportunities, and excellent product protection. These boxes are made from multiple layers of cardstock and kraft flutes to ensure sturdiness. The right size of a custom mailer box is one of the important factors for product protection during shipping. Read this blog to understand standard mailer box sizes! In this guide, you will learn about standard mailer box sizes in inches, large mailer box sizes, measurement tips, and how to select the perfect size for your products.

Why Understanding the Size of Mailer Boxes Matters?

As we know, mailer boxes are the benchmark of shipping safe and sound delivery. However, in modern times, mailer boxes' purpose has been shifted from just standard delivery to retail display, promotional boxes, subscription boxes, or other product packaging. All these changes has influenced by innovative packaging of mailer boxes, which is why knowing the variety of sizes from small, medium, large, or other custom dimensions is important for authentic and perfect packaging of everyday products and branding.

These custom styles determine the shipping cost of a mailer package. For instance, mailer boxes containing any extra inserts like bubble wrap, compartments, or custom inserts could lead to higher shipping costs. In case of inaccurate box dimension calculations can lead to an increased risk of damage or shipping costs. In fact, the box sizes also contribute to presentation, so you should better acknowledge the following dimensions of mailer boxes mentioned below:

How Are Mailer Box Sizes Measured? 

Before selecting a mailer box, you should know how packaging companies measure box dimensions.

Mailer box dimensions always follow this order:

Length × Width × Height (L × W × H)

• Length: Longest side of the box
• Width: Shorter side
• Height: Distance from base to top

Always measure the internal dimensions because they determine whether your product fits properly.

Standard Mailer Box Sizes Dimensions

Custom mailer shipping boxes are ideal for your e-commerce brand, whether you want to send gifts or fragile products to your customers. The right packaging always aligns with your product’s dimensions and brand personality. 

Therefore, measuring the right dimensions and incorporating customization are important when choosing custom mailer boxes. The following are shipping boxes standard sizes you must know when buying mailer boxes:

• Small Mailer Boxes

Small mailer box packaging is commonly used to ship small items like books, cosmetics, clothes, jewelry, and small electronics. The standard size of small mailer boxes is 12 x 12 x 12 inches. Most online and in-store brands use 12x12 mailer boxes for small gift cards, vouchers, and promotional items. However, some brands use the standard box dimensions for small shipping boxes as follows:

6 x 6 x 6 inch small shipping boxes are suitable for shipping lightweight small items.

8x 6 x 4 inch small shipping boxes are ideal for small electronics, jewelry, and cosmetics.

10 x 7 x 4 inch shipping boxes are suitable for books and magazines.

• Medium Mailer Boxes

Mailer box dimensions for medium-sized boxes depend on the shape and size of the products. Generally, the medium shipping box size ranges between 18 x 14 x 12 inches and 24 x 18 x 18 inches. Different brands use different types of medium mailer boxes. The following are some different dimensions of medium mailer boxes:

12 x 9 x 6 inch medium mailer boxes they are used to ship clothes (apparel packaging like vest packaging boxes, shirt boxes, and garment boxes) and toys.

14 x 10 x 4 inch medium mailer boxes are used for Larger books, magazines, shoes, and electronics. 

16 x 12 x 8 inch medium mailer boxes are used to ship small household items.

Large Mailer Boxes

Corrugated cardboard is used to create large shipping cartons to send heavy and bulky products. The standard mailer box sizes for large cartons are 24 x 18 x 24 inches. However, the following dimensions are also used for large mailer boxes:

18 x 14 x 12 inch large shipping boxes are suitable for heavier retail items.

20 x 16 x 10 inch large shipping boxes used to ship household and retail items.

22 x 18 x 16 inch large shipping boxes ideal for Pillows, blankets, and small quilts.

Extra Large Mailer Boxes

Extra large size of mailer boxes are used as shipping and moving cartons to ship heavier products. The large standard mailer box sizes are 20 x 20 x 15 inches. It also depends on the size, weight, and shape of items you want to ship in extra large shipping boxes. The following are some commonly used sizes for extra large shipping boxes:

20 x 20 x 18 inch extra large shipping boxes used for bulkier retail and household items.

30 x 20 x 20 inch extra large boxes used for heightened and bulkier items.

How to Choose the Right Mailer Box Size 

Selecting the correct mailer box size protects products while reducing shipping costs. Consider the following factors before ordering custom packaging:

• Measure your product accurately before selecting a box.
• Leave enough room for protective inserts.
• Avoid oversized boxes that increase shipping charges.
• Choose corrugated material for fragile products.
• Match the box dimensions with carrier shipping guidelines.
• Consider future branding requirements when choosing box styles.

Standard Shipping Box Sizes in Centimeter

The following are the most common shipping box sizes for shipping boxes measured in centimetres:

Small Shipping Box Size in Centimetre is 30.48 x 30.48 x 30.48

Medium Shipping Box Size in Centimetre is 45.72 x 35.56 x 30.48

Large Shipping Box Size in Centimetre is 60.96 x 45.72 x 60.96

Tips to Customize Standard Mailer Box Sizes

The number of digital shoppers has increased by 40% over the past five years. This is one of the reasons the demand for custom mailer boxes is due to the immense significance in the e-commerce industry. Brands use colorful and printed mailers boxes to leave a lasting impression on customers. 

For example, blue mailer box packaging looks trendy and appealing. Perfectly customized mailer boxes help improve your branding while ensuring product protection. The following are some tips you should consider when customizing standard mailer box sizes and designs:

1. Choose the high-quality corrugated cardboard.
2. Incorporate premium finishes for gift and luxury mailer boxes.
3. Pick the design theme that resonates with your brand persona.
4. Print QR codes and product traceability details on the boxes to make shipping easier.
5. Get your branding details printed with colors and fonts that align with the brand identity.
6. Consider a closing mechanism that offers your customers a memorable unboxing experience.

Common Mistakes When Choosing Mailer Box Sizes 

Avoid these common packaging mistakes:

1. Choosing oversized boxes.
2. Ignoring internal dimensions.
3. Forgetting protective inserts.
4. Using weak packaging materials.
5. Not checking courier size limits.
6. Selecting the wrong flute thickness.

Where to Buy the Standard Mailer Box Sizes?

If you are searching for where can I buy different size boxes, consider a custom packaging company. The right packaging company will offer you high-quality packaging at competitive prices with customization freedom. 
Share your mailer box ideas with a trusted packaging company to get precise mailing boxes sizes. Understanding the typical box dimensions helps you customize the right box to ship your products safely. You can also consider wholesale retailers, online packaging suppliers, and custom packaging companies like Custom Boxes Lane to customize the right mail box sizes.

Final Thoughts!

Custom mailer boxes are ideal to ship products safely over long distances because they are known for their strong construction. Every e-commerce brand relies on these boxes to win repeat customers. However, brands need to consider the standard mailer box sizes when customizing their product packaging. The right size and dimensions of mailer boxes ensure customers receive products in pristine condition and foster brand loyalty! 

Whether you need small, medium, or large mailer box sizes, choosing accurate dimensions reduces shipping costs, prevents product damage, and creates a professional presentation. Investing in the right mailer box size is a simple step that delivers long-term value for both your business and your customers.