Custom Mailer Boxes

Description

Damaged orders, weak presentation, and avoidable postage costs often begin with the wrong custom mailer boxes. A box that is too large allows products to move. A box that is too light may crush in transit. Plain packaging can also waste the first physical moment your customer has with your brand.

99 Custom Boxes creates made-to-fit mailer packaging for ecommerce brands, retailers, startups and B2B buyers across the UK. You can customise the size, board, print, colour and finish, then add inserts or closures where needed. The result is packaging that protects the order, supports faster packing and gives customers a stronger unboxing experience.

Your Shipping Box Should Solve More Than One Problem

Good packaging must fit the product, survive handling, stay practical for your packing team and still make financial sense.

Well-planned cardboard mailer boxes can reduce empty space, limit product movement, speed up packing and present a more consistent brand image.

A lightweight clothing order needs a different board and internal fit from a candle set or subscription kit. The delivery journey should guide each decision.

Choose Board Strength for the Journey

The right material depends on product weight, shape, value, and handling risk. Using the thickest stock is not always the smartest choice. It can add cost and weight without improving performance.

Corrugated mailer boxes offer a useful balance of protection and print quality. E-flute is often chosen when a neat print surface and good crush resistance are both important. Kraft mailer boxes create a natural, simple look, while coated boards support brighter artwork and sharper colour.

Common choices include:

• Corrugated board: for shipping, stacking and courier handling
• Kraft board: for natural branding and recyclable postal packaging
• Coated card: for smooth print and strong colour
• Reinforced options: for premium or higher-value products

Share the product weight, dimensions and delivery method with our team. We can help you compare practical options before production.

Better Sizing Cuts Waste and Improves Protection

Custom size postal boxes give you more control than standard packaging. A close fit reduces movement, but the box still needs room for tissue, padding or custom box inserts.

A common mistake is measuring the product alone. Always allow for a sleeve, leaflet, protective wrap or insert. A skincare set may need a fitted insert to keep bottles upright, while a clothing brand may need flexible space for folded items.

Large letter postal boxes or letterbox-friendly boxes may suit smaller products when the final packed dimensions meet the relevant postal format. Check the complete packed size before relying on a delivery category.

Print the Inside, Outside or Both

Printed mailer boxes turn routine deliveries into a visible brand touchpoint. A clear logo, consistent colour and short message can make the order feel more considered.

Full colour box printing works well for campaign artwork, product instructions, social handles and seasonal designs. CMYK suits detailed graphics and images. Pantone matching can help when brand colour consistency is critical.

You can choose:

• outside printing for a branded delivery pack
• inside printing for a surprise reveal
• double-sided printing for a complete unboxing experience
• one-colour artwork for a clean, cost-aware look
• full-colour graphics for stronger impact

Branded mailer boxes do not need to look busy. One strong colour, a clear logo and a useful message can feel more confident than artwork on every panel.

Finishes Should Add Value, Not Just Cost

Finishes can protect print, change how the surface feels or highlight a key detail. Options may include matte or gloss lamination, soft-touch coating, spot UV, foil stamping, embossing and debossing.

A luxury mailer box may pair a soft-touch finish with a small foil logo. A bright retail brand may prefer gloss or bold colour. An eco-focused business may keep coatings minimal to support easier recycling.

Choose finishes that improve the customer experience and justify their cost. Our team can help you select details that support the brand.

Small Structural Choices Make Packing Faster

Closure style affects speed, security, and presentation. Self-locking postal boxes form a neat shape without complex assembly. Flat-packed postal boxes also save storage space before use.

Depending on the design, you may consider:

• tuck-in flaps
• self-locking walls
• peel and seal boxes
• tear strips
• locking tabs
• internal dividers

Die-cut packaging boxes can be built around a specific product or opening sequence. This helps when a standard structure cannot provide enough support or the right presentation.

Useful Across Ecommerce, Retail and Subscriptions

Custom mailer boxes can be adapted for many delivery situations.

1. Fashion and accessories: Pack clothing, jewellery or lifestyle products in a clean branded format.
2. Beauty and skincare: Use inserts to separate bottles, jars or tubes.
3. Subscription brands: Create recognisable subscription box packaging while changing inserts or messages for each campaign.
4. Gifts and promotional kits: Improve the opening experience for influencer packs, employee gifts and launches.
5. Retail dispatch: Keep online orders connected to the branding customers see in-store.

Fragile products may need a stronger board, cushioning or fitted inserts. The outer box should be tested as part of the full packaging system.

Flexible Quantities for Testing and Growth

Startups often need low MOQ packaging to test a design before placing a larger run. Established sellers may need wholesale custom mailer boxes with reliable sizing and repeat colour control.

99 Custom Boxes supports orders from 100 units, with larger quantities available. This gives smaller brands room to launch and growing businesses a path towards bulk pricing.

Final cost usually depends on:

1. box dimensions
2. material and thickness
3. order quantity
4. print coverage
5. finishing choices
6. inserts or structural work
7. delivery schedule

For a clearer quote, provide the packed product size, quantity, artwork status, and preferred delivery date.

From Packaging Idea to Production

Our process keeps each decision clear:

1. Share your requirements: Send product dimensions, quantity and reference images.
2. Choose the structure: Select the board, closure and internal fit.
3. Prepare the artwork: Use our design support and box template.
4. Review the proof: Check size, spelling, colours and print position.
5. Approve production: Printing and finishing begin after approval.
6. Receive your order: Boxes arrive ready for assembly and packing.

A 3D mock-up helps you check the layout, while a physical sample can support unusual products or complex inserts.

Why Work With 99 Custom Boxes?

As a UK packaging company, 99 Custom Boxes supports businesses from early design decisions through production. Customers can choose custom dimensions, several board types, inside or outside printing, premium finishes, and insert options.

You also receive help with artwork and box templates, plus quantity options for small launches and bulk orders. The goal is simple: packaging that looks right, packs efficiently, and reaches the customer in good condition.

Make Every Delivery Feel Worth Opening

Your packaging should protect the product, support your packing team, and build confidence in the purchase. Custom mailer boxes bring those goals together in one practical format.

Send 99 Custom Boxes your dimensions, quantity, and artwork ideas. Get a free quote, request design support, or ask about a sample before placing your full order.

Frequently Asked Questions

What are custom mailer boxes used for?

They are used for ecommerce orders, subscription products, retail goods, gifts and promotional kits.

Can I order my own box size?

Yes. Dimensions can be tailored around the product, protective materials, and inserts.

What is the minimum order quantity?

Orders can start from 100 boxes. The best quantity depends on your budget and usage.

Are mailer boxes suitable for fragile products?

Yes, when paired with suitable corrugated strength, cushioning, or fitted inserts.

Can the inside of the box be printed?

Yes. Printing can be applied outside, inside, or on both sides.

Which printing option is best?

CMYK suits detailed full-colour artwork. Pantone matching helps maintain precise brand colours.

Are eco-friendly mailer boxes available?

Recyclable board and kraft options are available. Coatings and add-ons can affect final recyclability.

Do the boxes arrive flat-packed?

Most mailer styles can be supplied flat-packed to reduce storage space.

Can I add custom inserts?

Yes. Inserts, dividers and platforms can secure products and improve presentation.

How long does production take?

Timing depends on quantity, artwork approval, materials and finishes. Share your deadline when requesting a quote.