mailer boxes uk

Practical mailer boxes uk businesses use for daily despatch combine a self folding structure, dependable corrugated board and print that makes each parcel unmistakably theirs. Custom Postal Boxes, a project of Vertex Packaging based in Wolverhampton, makes mailer boxes uk wide to order, in sizes built around the products being posted.

Why mailer boxes uk retailers choose this format

A mailer box folds from a flat sheet into a lidded box whose front flap tucks or locks into place, so it protects like a box but packs at the speed of an envelope style mailer. The double thickness walls formed at the sides during folding give surprising crush resistance for the weight of board involved, and the finished parcel looks tidy enough to be the final presentation the customer opens.

Our custom mailer boxes UK range is used for cosmetics, candles, clothing, gifts, stationery, small electronics and subscription orders. Because each run is made to size, the box fits the product rather than forcing the product and a wad of filler into the nearest stock dimension.

Styles within the mailer family

A standard tuck front mailer is the versatile default. A self seal mailer box adds an adhesive strip that speeds sealing on a busy bench, while a tear strip mailer box gives the customer a clean opening line and can support returns where a second seal is specified.

Kraft, white and printed board compared

Kraft board gives a natural brown surface that suits simple bold logos and is a favourite with makers and food brands. White board gives brighter colour reproduction and a cleaner retail feel. Both are corrugated and both can be printed inside and out, and our kraft mailer boxes page shows the character of the natural finish if you are deciding between them.

Sizing mailer boxes uk orders for Royal Mail formats

Many mailer orders are planned backwards from a postal format. Royal Mail large letter allows up to 353 mm by 250 mm by 25 mm and 750 g, which suits only the slimmest packed items, while the small parcel format allows up to 450 mm by 350 mm by 160 mm and 2 kg according to the Royal Mail size and weight guidance.

Letterbox friendly designs deserve a test with a real letterbox where possible, because flap design and letterbox size vary between properties. If an order must go through the door, keep the packed depth modest, avoid rigid inserts that add thickness at one point, and remember that a parcel which fits when empty may bulge once a soft product is packed tightly.

Printing and running a mailer based operation

Print the outside for recognition and the inside lid for the message the customer reads while opening. Keep logos clear of the tuck flap edges and place reorder prompts where they will be seen after the product is lifted out. The broader custom mailer boxes category shows how the styles relate if you plan to add sizes over time.

Storage, assembly and reordering

Mailers arrive flat, so a large quantity takes a modest shelf footprint and can be stored beside the packing bench. Assembly becomes a rhythm after a few boxes, and a sample assembled box kept on the bench helps seasonal staff match the standard. Note the size and print version on your reorder so repeat runs match the boxes your customers already know.

Pricing depends on size, material and quantity, so each specification is quoted individually. Low minimum order quantities suit launches and small ranges, free design support is included and UK delivery is free. Share your product dimensions through our contact page for a quote and we will suggest a mailer size and style for the way you pack.

FAQs

Will a mailer box fit through a letterbox?

Only if the packed box is slim enough and the letterbox is a standard size, because both vary. Slim products in a low profile mailer often fit, but thicker orders will not, and forcing a parcel can damage the contents and the flap. Tell us the product thickness and that letterbox delivery matters to you, and we will design towards it and suggest a test before you commit.

Do mailer boxes need tape to stay closed?

A tuck front mailer locks mechanically and many sellers post it without tape for a cleaner finish. A self seal version adds an adhesive strip for extra security and faster packing. For heavier contents or long journeys, a short length of tape over the front join is a sensible precaution. We can advise which closure suits your product weight and packing speed.

Can mailer boxes be printed inside and outside?

Yes. Outside print carries your branding through the post, and inside print is revealed as the lid opens, which makes it ideal for a greeting, care notes or a reorder prompt. The design is planned as one piece so the inside message sits in the centre of the lid. Our free design support checks the layout before production begins.

What quantities can I order to start with?

Low minimum order quantities are a core part of our service, so you can begin with a quantity that suits a launch or a single product line and reorder as sales grow. Pricing depends on size, material and quantity. Starting sensibly also lets you confirm the size and print with real orders before committing to a larger run.