What Are the Different Types of Postal Boxes? (And Which One You Actually Need)

Ever looked at a pile of boxes and wondered which one you should actually use? It happens. A box that works perfectly for one product may be completely unsuitable for another.

The size, weight, shape and fragility of your product all matter. So, rather than choosing a box simply because it looks about right, it helps to know what each type is designed for. The right packaging supplies can make packing easier while keeping your products protected during delivery. 

What are the different types of postal boxes?

Postal boxes come in several shapes and designs. Some are made for everyday ecommerce orders, while others are better suited to books, flat products or faster packing.

Standard Postal Boxes

Enter your text hereThese are the everyday cardboard boxes most people associate with sending products through the post. Made from corrugated board, they come in different sizes and are useful for a wide range of products.

• Suitable for clothing, stationery, accessories and general merchandise
• Available in various dimensions
• Easy to fold, pack and seal
• Practical for everyday ecommerce orders

For example, a business selling handmade candles can use a suitably sized box with protective material around the product, without leaving much unnecessary space....

Self-Seal Postal Boxes 

If you pack orders throughout the day, sealing every box with tape can take longer than you expect. Self-seal postal boxes make this simpler with an integrated adhesive strip. Some also feature tear strips for easier opening.

• Quick to assemble and close
• Useful for high-volume ecommerce
• Gives parcels a neat finish
• Easier for customers to open

For an online retailer processing hundreds of orders, that small saving in packing time can make a real difference.

Book Wraps

Book wraps are not limited to books. Their adjustable design makes them useful for flat products that need a close-fitting layer of protection.

• Suitable for books, magazines and catalogues
• Useful for games, DVDs and similar products
• Adjusts around different product thicknesses
• Helps protect corners and edges

A second-hand book seller, for instance, can use a book wrap to keep a paperback or hardback firmly in place rather than putting it in a much larger box.

Envelope Boxes 

Envelope boxes are slim postal cartons designed for smaller, flatter products. Their compact shape can be useful when keeping the parcel size down is important.

• Suitable for documents and flat merchandise
• Useful for small accessories
• Takes up less space than deeper cartons
• Handy for certain postal formats

An online business selling prints, stationery or small flat products may find this style more convenient than a standard carton.

How do you choose the right postal box?

Start with the product, not the box. Measure its length, width and height, then consider whether you need bubble wrap, paper or another protective material.

You want enough room to protect the item, but not so much that it moves around during transit.

Your order volume matters too. A box that works well for a handful of weekly orders may become inconvenient when you are packing hundreds of orders.

What should you check before buying?

Dimensions are only part of the decision. Think about what happens during packing, storage and delivery as well.

Things Worth Checking

• Internal dimensions of the box
• Weight of the finished parcel
• Fragility of the contents
• Amount of protective material required
• Available storage space
• Packing speed
• Postal size and weight limits
• Ease of opening for customers

For example, a small fashion business may prioritise packing speed and storage, while a company shipping delicate components will be more concerned about protection and strength.

Do you always need a postal box?

Not necessarily. Some products are better suited to flexible packaging.

Clothing, soft furnishings and other non-fragile goods can often be sent in postal bags. Smaller products that need additional cushioning may be better suited to bubble mailers.

The important thing is to match the packaging to the product. A rigid carton is not automatically better if the item is soft, lightweight and unlikely to break. 

What common mistakes should you avoid?

Choosing a box that is much too large is one of the easiest mistakes to make. Excess space allows the product to move around and can mean using more protective filling than necessary.

Going too small is equally problematic. The contents may be squeezed, or there may not be enough room for cushioning.

Packing Problems to Avoid

• Leaving excessive space
• Forgetting to allow room for cushioning
• Using lightweight packaging for heavy products
• Overfilling the box
• Ignoring postal size restrictions
• Choosing packaging that takes too long to assemble

Once packed, gently move the parcel. If the product slides around inside, you may need a closer-fitting box or additional protection.

Which postal box should you actually choose? 

There is no single answer for every shipment. Standard boxes are useful for everyday products; self-seal boxes are convenient for busy ecommerce operations; book wraps work well for flat products; and envelope boxes are useful when a slimmer format is needed.

The best postage boxes are the ones that fit your product and your packing process. You do not necessarily need the biggest or strongest option. You need one that does the job properly.

Conclusion 

Choosing the right postal box is really about matching the packaging to the product. Consider its dimensions, weight, shape and fragility, then think about how it will be packed and delivered. Once you understand these basics, selecting from your packaging supplies becomes much easier.

FAQs

1. What is the most commonly used postal box?

Standard corrugated postal boxes are among the most versatile options because they suit many everyday products and come in various sizes.

2. What are self-seal postal boxes used for?

They are useful for businesses that frequently pack orders. Their built-in adhesive closure makes sealing quicker and simpler.

3. What can I send in a book wrap?

Books are the obvious choice, but they can also be used for magazines, catalogues, games, DVDs and other flat products.

4. Are envelope boxes suitable for small products?

Yes. Their slim shape makes them useful for documents, flat merchandise and lightweight products that do not need a deep carton.

5. Should I use a postal box or a mailing bag?

It depends on the product. Boxes provide structure and protection, while mailing bags are often suitable for soft, lightweight and non-fragile goods.