A5 packaging boxes

A5 packaging boxes are postal boxes built around A5 paper, which measures 148 mm wide by 210 mm long, so documents, booklets and slim products sit flat without bending or sliding. At Custom Postal Boxes, A5 packaging boxes are manufactured in house in Wolverhampton, with custom print, low minimum order quantities and free UK delivery.

Why A5 packaging boxes suit A5 paper and slim goods

An A5 sheet is half the size of A4, and it is the working size for a huge share of everyday print, from brochures and instruction booklets to notebooks and greetings cards. A box made for that footprint holds the contents squarely, so corners stay crisp and pages arrive without the curling or creasing that a loose envelope allows. The rigid walls also protect flat items when they are stacked with heavier parcels in a delivery van or sorting office.

Compared with a C5 envelope, which also holds A5 paper, a box gives solid edge protection on all four sides and a lid that stays shut under pressure. That makes A5 packaging boxes a sound choice for items with some value or fragility, such as framed prints, boxed cosmetics, gift vouchers in presentation wallets and small electronics in retail cartons. Businesses posting the same A5 product daily also gain packing speed.

Sizes, board and Royal Mail bands

Choosing the right depth

Length and width follow the A5 footprint, so depth is the decision that matters most. Shallow boxes suit paper stacks, booklets and prints. Medium depths suit single boxed products, and deeper A5 boxes suit sets or items packed with protective tissue. Measure your product at its thickest point, add a little room for any wrap or filler, and choose the closest depth so the contents cannot move about in transit.

Board grades and print surfaces

Most A5 postal designs are made from single wall corrugated cardboard, which balances low weight with good crush resistance. Kraft board gives a natural brown finish that suits handmade and refill brands, while white board gives a clean background for bright artwork and photography. Both take print well and both are widely recycled after use.

Kraft or white board for your artwork

Kraft board softens colours slightly and gives print a warm, earthy feel, which many food, craft and wellbeing brands prefer. White board keeps colours true and text sharp, which suits instruction heavy packs and retail style graphics. Pale colours and fine detail usually sit best on white board.

Depth also decides the Royal Mail band. An A5 box that keeps the finished parcel within 353 mm long, 250 mm wide, 25 mm thick and 750 grams can travel as a large letter, while a deeper or heavier A5 parcel moves into the small parcel band. You can check current formats on the Royal Mail prices and formats page before you fix your box depth, because staying in the lower band on every order adds up to a real saving over a year.

Print, packing and ordering

Custom print turns a plain A5 box into part of the product. Logos and colours on the lid are seen first, while a message or care note printed inside the lid rewards the customer as they open it. For related formats, the A5 Postal Boxes product page shows the core style, and Letterbox Postal Boxes and Large Letter Postal Boxes cover slimmer posting needs. The Postal Boxes by Size category helps you compare footprints, and our guide to large letter cardboard boxes explains the band rules in more depth.

Packing well is simple. Place flat items centrally, add tissue or a sheet of card if the surface could scuff, close the lid fully and tape or seal as the style requires. Because ordering is quote based, pricing depends on size, material and quantity, and you can request your price through the contact page for a quote. Free design support and free UK delivery are included, and low minimum order quantities mean small print runs and test batches are practical for growing brands.

FAQs about A5 packaging boxes

What size is an A5 packaging box?

An A5 packaging box is made to hold A5 paper, which measures 148 mm wide by 210 mm long, with a small amount of clearance around the edges. Depth varies by style, from shallow large letter depths for paper stacks to deeper boxes for boxed goods.

Will an A5 packaging box fit through a letterbox?

A shallow A5 packaging box that stays within the Royal Mail large letter limits of 353 mm long, 250 mm wide and 25 mm thick is designed to pass through most standard letterboxes. Deeper A5 boxes are classed as small parcels and are handed to the recipient or left in a safe place instead.

What can I send in A5 packaging boxes?

A5 packaging boxes suit A5 documents, brochures, notebooks, art prints, calendars, paperback books and flat gift items. They are also used for slim boxed products such as cosmetics, phone accessories and stationery sets that need more protection than an envelope gives.

Can A5 packaging boxes be printed with my logo?

Yes. A5 packaging boxes can be printed on the outside, the inside or both, with your logo, colours and product information. Free design support is included, so artwork is checked and set up correctly for the box size before printing begins.

How do I order A5 packaging boxes?

Ordering starts with a quote, because pricing depends on the size, material and quantity you need. Send your product dimensions and quantity through the contact page and the team will confirm a price for your A5 packaging boxes before anything is made.