boxes for postage packaging

boxes for postage packaging are the cartons, mailers and postal boxes that protect goods travelling through the Royal Mail and courier networks, sized to real postage bands so parcels stay safe and postage stays sensible. Custom Postal Boxes makes boxes for postage packaging in Wolverhampton for UK businesses, with custom print, low minimum order quantities and free UK delivery.

Choosing boxes for postage packaging by parcel band

Royal Mail prices most items by size as well as weight under its Pricing in Proportion system, so the box you choose has a direct effect on what every order costs to send. A large letter can measure up to 353 mm long, 250 mm wide and 25 mm thick and weigh up to 750 grams. A small parcel can measure up to 450 mm long, 350 mm wide and 160 mm deep and weigh up to 2 kg. A medium parcel can measure up to 610 mm long, 460 mm wide and 460 mm deep and weigh up to 20 kg.

Good buying starts by matching your best selling products to the lowest band they honestly fit. Slim and flat goods belong in large letter boxes. Most clothing, cosmetics, books and boxed goods belong in small parcel mailers. Anything deeper, heavier or sold as a set belongs in a proper shipping carton. The Royal Mail prices page lists the current formats and prices, and it is worth checking before you settle a box size you will use thousands of times.

Styles and materials that travel well

Postal boxes and mailer boxes

Postal boxes are neat, lid closing cartons made for single products and flat goods, and they present well when the customer opens them. Mailer boxes fold from a single sheet of corrugated board into a strong box with a tuck in lid, which makes them fast to pack and tidy to receive. Both styles appear across the Cardboard Postal Boxes and Small Postage Boxes ranges and suit the bulk of online orders sent from small and growing shops.

Shipping cartons for heavier loads

Shipping cartons use taped seams and stronger board grades, because they are built for weight rather than presentation alone. Single wall board suits light and medium loads, while double wall board resists crushing when parcels are stacked in cages and vans. The Cardboard Shipping Boxes range covers these workhorse styles.

Single wall or double wall board

Single wall board has one layer of fluting between two outer sheets and is the right choice for most parcels under a few kilograms. Double wall board has two fluting layers, which adds stacking strength and puncture resistance for heavy, fragile or high value goods. If parcels are arriving dented, moving up a board grade usually fixes the problem faster than adding more filler.

Right sizing matters for waste as well as cost. A box that fits closely needs less void fill, weighs less and takes up less room in transit. Businesses that place packaging on the UK market may also have duties under the producer responsibility rules, which are explained in the GOV.UK packaging producer responsibilities guidance. Browse the full shop to compare styles side by side.

Packing well and ordering with confidence

Even the right box fails if it is packed badly. Centre the product, fill any gaps so nothing rattles, close every flap fully and tape seams so they cannot spring open. Keep key artwork away from fold lines and leave a clear area for the postage label.

Every order here is quote based, because pricing depends on size, material and quantity rather than a fixed list price. Low minimum order quantities let you trial a size before committing, free design support helps you get print right first time, and free UK delivery keeps the delivered cost clear. Send your product sizes through the contact page for a quote and the team will match you to boxes for postage packaging that fit your products and your postage bands.

FAQs about boxes for postage packaging

What are the best boxes for postage packaging?

The best boxes for postage packaging are the smallest sturdy boxes that fit your product with a little room for padding. Slim items suit large letter boxes, most everyday orders suit small parcel mailers, and heavy or bulky goods need stronger shipping cartons, ideally double wall board.

How do I choose the right size of postage box?

Measure your product at its longest, widest and deepest points, then add a small allowance for wrap or filler on each side. Compare the result with Royal Mail band limits before you order, because a box that is even slightly too deep can move the whole parcel into a higher postage band.

What does Pricing in Proportion mean?

Pricing in Proportion is the Royal Mail system that sets postage by the size and weight of the finished parcel as well as its contents. Parcels are grouped into bands such as large letter, small parcel and medium parcel, and each band has maximum dimensions and a maximum weight.

Can boxes for postage packaging be printed?

Yes. Boxes for postage packaging can carry your logo, colours, handling notes and returns information, printed outside, inside or both. Printed postage boxes help customers recognise your parcels at once and make unboxing feel like part of the product rather than an afterthought.

Are cardboard postage boxes recyclable?

Cardboard postage boxes are widely recycled through household and business collections once tape and labels are removed where possible. Choosing the right size also cuts waste, because a well fitted box needs less filler and less material overall than an oversized carton.