a5 postage boxes

a5 postage boxes are postal cartons sized around A5 paper, which measures 148 mm by 210 mm, so prints, booklets and flat goods sit neatly without bending or sliding. Custom Postal Boxes makes a5 postage boxes to order in Wolverhampton for UK businesses that want a tidy fit, reliable protection and print that presents the brand well. Low minimum order quantities and free UK delivery make both short runs and repeat orders practical.

A5 is a familiar size for customers, yet the right box depth matters as much as the footprint. A slim contents set can travel as a large letter, while a thicker set needs the room and strength of a small parcel box.

Why a5 postage boxes suit flat and compact goods

The A5 footprint suits items that are flat by nature. Art prints, notebooks, paperback books, greetings card bundles, invitations, calendars, cosmetic compacts and small boxed accessories all sit well in this format. Because the box holds the contents across their full face, corners stay supported and edges are less likely to crease than they would inside a loose envelope. Our A5 postal boxes are made to the depth your contents need, so the lid closes cleanly without pressing on the top item.

Matching depth to Royal Mail bands

Royal Mail charges by size and weight, so the finished packed box decides the band. A large letter may measure up to 353 mm by 250 mm by 25 mm and weigh up to 750 g. A small parcel may measure up to 450 mm by 350 mm by 160 mm and weigh up to 2 kg. Check the current figures on the Royal Mail prices and size guidance before you commit to a depth. A box near 20 mm deep can suit slim contents, while a deeper box gives room for padding, sets and gifts.

A simple fit test before you order

Stack the contents exactly as a customer will receive them, including tissue, a card and any protective wrap. Measure the stack at its highest point and add a small allowance so the lid does not bulge. Weigh the packed sample as well, because board, wrap and labels all count towards the band limit. Recording the result for each product set saves guesswork at the packing bench.

Materials and print for a5 postage boxes

Most boxes in this size use corrugated cardboard with a fine flute, which gives a smooth outer surface for print and enough stiffness to protect flat goods. Kraft board gives a natural brown finish that suits handmade and refill ranges, while white board shows bright artwork clearly. Our kraft postal boxes show the natural route, and our printed postal boxes show how full artwork can carry a logo, pattern and care wording. Print can sit outside for recognition in transit, inside the lid for a message on opening, or in both places.

Protection without wasted space

A close fit is the first layer of protection. Add a board pad under prints, wrap books at the corners and keep loose items in a small inner sleeve so they do not rub. Avoid filling a deep box with loose material when a shallower box would hold the set firmly. Less empty space means less movement, less waste and a neater arrival for the customer.

Choosing and ordering with confidence

List each product set you plan to send, note its packed size and weight, then choose one box size that covers most sets well rather than forcing every set into a single carton. Businesses placing packaging on the market can also read the packaging producer responsibility guidance on GOV.UK to understand wider duties. Pricing depends on size, material and quantity, so request a quote through our contact page with your measurements and artwork ideas and use the free design support before production. If some sets are thinner than others, our large letter postal boxes may suit those orders better.

FAQs about a5 postage boxes

What size are a5 postage boxes?

a5 postage boxes are built around A5 paper at 148 mm by 210 mm, with internal room a little larger so contents slide in without catching and with depth chosen for the packed set. The exact internal size and depth are made to order, so a slim print set and a thicker gift set can each get a suitable fit.

Do a5 postage boxes count as a large letter?

a5 postage boxes can count as a large letter when the finished packed box stays within 353 mm by 250 mm by 25 mm and weighs no more than 750 g. Thicker or heavier sets move into the small parcel band, so always measure and weigh a packed sample before buying postage.

What can I send in a5 postage boxes?

You can send prints, notebooks, paperback books, card bundles, invitations, calendars, stationery sets and small boxed accessories in a5 postage boxes. Flat goods benefit most because the box supports the full face of the item and protects the corners during handling and delivery.

Can a5 postage boxes be printed with my branding?

Yes. a5 postage boxes can be printed inside and outside with your logo, artwork, colours and wording, with free design support to check placement before production. White board gives the clearest base for bright colours, while kraft board gives a natural look that suits simple bold print.