A3 Postage Boxes - Plain & Custom Printed Boxes Available

Low minimums of 25 units for plain and printed boxes. Our cardboard A3 postage boxes provide a reliable and efficient solution for shipping or mailing larger documents, prints, or products. Made from durable and recyclable cardboard, these boxes offer sturdy protection and easy assembly. Whether you need to send artwork, posters, or important files, our A3 postage boxes provide the perfect fit and security for your items.

A3 Postage Boxes — Versatility and Durability for Every Application

Our A3 postage boxes are one of our most versatile sizes — perfect for documents, brochures, art prints, and flat products. Strong corrugated cardboard, self-locking, and available across 11 size variations plain or custom printed from just 25 units.

Versatility and Durability in Every Configuration

Our A3 postage boxes are built for shipping A3-sized items (297 x 420mm) — from documents and legal paperwork through to art prints, brochures, marketing materials, and flat retail products. With 11 size variations available, you'll find the right depth and configuration for your specific needs.

No matter the size or type of your business, our A3 boxes provide a reliable, professional packaging solution that protects your contents from corner damage, creasing, and moisture during transit.

Why PackQueen's A3 Postage Boxes?

11 size variations — from slim flat mailers through to deeper configurations for bulkier contents
Corrugated cardboard — strong and rigid without being unnecessarily heavy
Self-locking, no tape required — assemble in seconds for efficient high-volume packing
Flat-packed — easy to store and cost-effective to receive in bulk
From 25 units — low minimums suit both occasional and regular users
100% recyclable — supporting your sustainability goals

Custom Printed A3 Boxes

Add your branding to every shipment. Our custom printed A3 postage boxes let you showcase your logo and brand colours, reinforcing your business identity with every delivery. Available from 25 units with a range of print finishes.

Compare A-Series Postage Box Sizes

Browse our full range of cardboard postage boxes to find the right fit:

A1 — 594 x 841mm — large format posters and plans
A2 — 420 x 594mm — medium large-format prints
A4 — 210 x 297mm — books, documents, retail items
A5 — 148 x 210mm — compact lightweight shipments

Sample Before You Commit

With 11 variations available, we strongly recommend ordering a sample to confirm the right depth for your product before placing a bulk order. Contact us at info@packqueen.com.au and we'll help you choose the right configuration.

A3 Postage Box FAQs

What are A3 postage boxes used for?

A3 postage boxes are designed for shipping A3-sized items (297 x 420mm) such as documents, artwork, marketing materials, prints, and flat products. They can also accommodate A1, A2, A4, and A5 items depending on the box height selected.

What is the minimum order for A3 postage boxes?

Our plain A3 postage boxes are available from a minimum of 25 units — one of the lowest minimums in Australia. Custom printed A3 boxes start from 25 units.

Do A3 boxes require tape to close?

No. Our A3 postage boxes use an interlocking self-locking design that requires no tape or glue to assemble. They ship flat for easy storage and assemble quickly when needed. We recommend adding packing tape over the closure for high-value shipments.

Are A3 postage boxes made from recycled materials?

Yes. Our A3 postage boxes are made from recycled and recyclable corrugated cardboard, supporting eco-friendly packaging practices for businesses of all sizes.

Can A3 postage boxes be custom printed?

Yes. Custom printing is available on our A3 postage boxes. Add your logo and branding to turn every shipment into a brand touchpoint. Contact our team at info@packqueen.com.au to get started.

Ordering & Custom Printing FAQs

How do I place an order?

You can place orders with PackQueen conveniently by either using our online platform or by simply emailing your order or purchase order to info@packqueen.com.au

How long will it take to get my order?

It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

Can I order a sample?

Absolutely. At PackQueen, we provide samples of all our products so you can test them out before making a purchase. You have the option to buy these samples directly online or reach out to our team via emailinginfo@packqueen.com.aufor assistance on how to order these.

Do your offer custom printing?

We sure do. At PackQueen, we love adding a personal touch to your packaging! You'll be thrilled to know that we offer printing on nearly all of our packaging options. While you can find our print prices online, email our friendly team atinfo@packqueen.com.auif you have a specific printing idea in mind that you can't find listed.

Do you offer custom sized packaging?

At PackQueen, we've got you covered with custom-sized packaging tailored just for you. Starting from a minimum quantity of 250 units, our custom packaging services are top-notch. With over 18 years of experience in the industry, custom packaging is our specialty! Email our team today at info@packqueen.com.auand let's create something amazing together!

How long does shipping take?

We typically process and ship stock products within 1-2 business days. Standard shipping times vary depending on your location. For our made to order and custom products, lead times are specified on the individual product page. If you have an urgent request, always get in touch with our team at info@packqueen.com.auor on 03 8689 9344 so we can see how we can help.

What payment methods do you accept?

We accept major credit cards (Visa & Mastercard) as well as PayPal for secure and convenient payment and Direct Deposit.