custom made mailer boxes

custom made mailer boxes are folding boxes made to your product size for ecommerce, subscription and postal orders, where the box is both protection and presentation. They lock together without a separate lid, open cleanly for the customer, and can be printed inside and outside to create a memorable unboxing. When size, board and closure are matched to the order, mailer boxes pack quickly, travel well and look professional on arrival.

Why custom made mailer boxes suit online orders

Online customers cannot touch a product before buying, so the arrival experience carries extra weight. A mailer box that fits well, opens easily and shows thoughtful branding reassures the customer that the order was packed with care. That impression supports repeat orders and reviews, especially for subscription brands where the same box arrives regularly. A plain, oversized postal box, by contrast, can make even a good product feel like an afterthought.

Mailer boxes also suit the practical side of ecommerce. They ship flat, assemble quickly without complex taping, and stack neatly for storage. A self locking design reduces packing time, because staff do not need to tape every seam, and it gives a cleaner opening for the customer, with no tape to cut through. For businesses packing many orders a day, those small time savings add up, and a consistent box size makes quality checks easier.

How a mailer box differs from a shipping carton

A shipping carton is primarily a protective outer box, sealed with tape and designed for handling. A mailer box is designed to be seen: it has a tuck in lid or a self locking flap, a clean exterior for print and often a printed interior. It still protects the product, usually with corrugated board, but its structure is chosen for opening as well as for transit. For fragile or heavy goods, a mailer box may still need an outer shipping box, but for most light to medium ecommerce orders, a well specified mailer box is sufficient on its own.

Choosing board for a mailer box

E flute corrugated board is a common choice for mailer boxes, because it is light, protective and gives a smooth surface for print. For heavier orders, a stronger flute or a heavier board grade may be needed, especially if parcels will be stacked. Kraft board gives a natural look that suits handmade and sustainable brands, while white board gives brighter print and a cleaner look for beauty, food and gift brands. Test the board with your actual products, because a board that looks good empty may bow when packed with a heavier order.

Designing custom made mailer boxes

Design starts with the finished order: the products, any inserts, tissue, cards or samples included, and how the customer will open the box. Measure the packed order, not just the main product, and allow room for protection without leaving space for movement. A snug fit with a fitted insert or divider usually protects better than a large box with loose filler, and it photographs better on opening. If the box will carry a returns label or a reseal strip, plan that feature into the structure from the start, rather than adding it later.

Print planning matters for mailers. Outside print should be bold and simple, so the brand is clear even after handling. Inside print can carry a pattern, a thank you message, care guidance or a repeat order reminder, and it is protected until opening, so it stays crisp. Keep the delivery label area clear on the outside, and avoid placing essential text across folds where it can distort. If you use a printed interior, leave room for the product and inserts, so the interior design is revealed gradually rather than hidden completely.

Closures, inserts and unboxing details

Closure choice affects both packing speed and customer experience. A tuck in lid is simple and reliable, a self locking flap gives a cleaner look and a more secure close, and a tear strip gives an easy, tamper evident opening. Inserts, dividers and trays keep products in place and create a tidy reveal, especially for sets or subscription boxes with several items. Small details such as tissue, a printed card or a neatly folded insert can elevate unboxing without adding much packing time, provided they are planned as part of the box design.

Planning for returns and repeat orders

If returns are common, choose a closure that can be resealed cleanly and include a returns note inside the box. Customers are more likely to return an item in good condition if the original box reseals easily. For subscription orders, keep the box structure constant across months and vary only the interior print or inserts, so customers recognise each delivery while still enjoying a fresh unboxing. Consistency also helps staff, who can pack each month without learning a new box.

Ordering custom made mailer boxes

For a quote, provide the packed order dimensions, product weight, board preference, print areas, closure type and quantity. State whether print is needed outside only, inside only, or both, and whether the box will be posted alone or inside an outer shipping box. After final artwork approval, standard lead times are 10 to 14 working days and corrugated lead times are 12 to 15 working days, as production guides rather than guaranteed dates. Allow time for a proof, especially for inside print, where alignment matters.

You can request a quote for made to fit mailer boxes with your order sizes and print needs, and browse the full shop for related packaging. For a branded shipping option, see custom logo boxes shipping. Delivery guidance is on the delivery information page. When using Royal Mail, check parcel limits on the Royal Mail Tracked 24 service information page.

Testing a mailer box before a full run

Pack a sample exactly as a customer order, close it, and ask someone unfamiliar with the product to open it. Check that the closure holds, the products stay in place, the interior print is visible at the right moment and the box opens without tearing. Also check the sealed box after gentle handling: turn it, lift it and look for bulging or movement. Adjust the insert or size before a full run, because a mailer box fault is visible to every customer who receives it.

Storing and assembling mailer boxes

Store mailer boxes flat, dry and grouped by size, with inserts kept with their matching boxes. Train packing staff on the folding sequence, because a mailer box assembled in the wrong order can look untidy or close poorly. Keep a small number assembled for urgent orders, and check a sample from each delivery for print, fold and closure quality before packing a full batch.

Frequently asked questions

What is a mailer box?

A mailer box is a folding, self contained box designed for postal and ecommerce orders. It usually has a tuck in or self locking lid, can be printed inside and outside, and opens cleanly for the customer without a separate lid or heavy taping.

Are mailer boxes strong enough for posting?

Yes, for most light to medium ecommerce orders, when the board grade suits the weight and the fit is snug. Very heavy or fragile orders may need stronger board or an outer shipping box for extra protection.

Can I print inside a mailer box?

Yes. Inside print is a popular choice for patterns, thank you messages and care guidance. It stays protected until opening, so it arrives crisp and creates a strong unboxing moment.

Do mailer boxes need tape?

Many self locking mailer boxes do not need tape for a secure close, although a small tape seal can be added for security. Check the closure with a packed sample before deciding, and keep the delivery label area clear.

Are mailer boxes suitable for subscription orders?

Yes. A consistent mailer box structure with varying interior print or inserts works well for subscriptions, because customers recognise each delivery while still enjoying a fresh reveal each month.