Ready-made packaging · 12 products
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.
![Large Post Box for 5kg Post Satchel [Express Value Buy] - PackQueen](http://www.packqueen.com.au/cdn/shop/products/large-post-box-for-5kg-post-satchel-express-value-buy-packqueen-862250.jpg?v=1756950433&width=600)
449 x 331 x 70mm
430 x 307 x 50mm
430 x 307 x 100mm
430 x 307 x 50mm
![Oversized A3 Multi Crease (1 Box 5 Heights 10/20/30/40/50mm) - Kraft Brown [Value Buy] - PackQueen](http://www.packqueen.com.au/cdn/shop/files/oversized-a3-multi-crease-1-box-5-heights-1020304050mm-kraft-brown-value-buy-packqueen-528049.jpg?v=1756949950&width=600)
![Oversized A3 Multi Crease (1 Box 5 Heights 10/20/30/40/50mm) - Kraft Brown [Value Buy] - PackQueen](http://www.packqueen.com.au/cdn/shop/files/oversized-a3-multi-crease-1-box-5-heights-1020304050mm-kraft-brown-value-buy-packqueen-560593.jpg?v=1756949950&width=600)
520 x 397 x 50mm
![RSC Shipping Carton [Suits Large Aus Post Satchel] - PackQueen](http://www.packqueen.com.au/cdn/shop/products/rsc-shipping-carton-suits-large-aus-post-satchel-packqueen-241701.jpg?v=1756947202&width=600)
![RSC Shipping Carton [Suits Large Aus Post Satchel] - PackQueen](http://www.packqueen.com.au/cdn/shop/products/rsc-shipping-carton-suits-large-aus-post-satchel-packqueen-594006.jpg?v=1756947203&width=600)
449 x 331 x 70mm
555 x 360 x 100mm
450 x 250 x 50mm
480 x 360 x 110mm
About this range
A3 Postage Boxes — Versatility and Durability for Every Application
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.
FAQs
A3 Postage Boxes - Plain & Custom Printed Boxes Available FAQs
Answers about a3 postage boxes - plain & custom printed boxes available, plus ordering, samples and custom printing.
About a3 postage boxes - plain & custom printed boxes available
What are A3 postage boxes used for?
What is the minimum order for A3 postage boxes?
Do A3 boxes require tape to close?
Are A3 postage boxes made from recycled materials?
Can A3 postage boxes be custom printed?
Ordering & custom printing
How do I place an order?
You can order online, or email 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 within Australia take 5–7 business days to arrive. Overseas deliveries can take 7–16 days. Delivery details are in your confirmation email.
Can I order a sample?
Absolutely. We provide samples of all our products so you can test them before you buy. Buy samples directly online, or email info@packqueen.com.au and our team will help.
Do you offer custom printing?
We sure do — we offer printing on nearly all of our packaging. Print prices are listed online, or email our team at info@packqueen.com.au if you have a printing idea you can’t find listed.
Do you offer custom sized packaging?
Yes. We make custom-sized packaging from a minimum of 250 units, with nearly 20 years of experience behind every job. Email info@packqueen.com.au and let’s create something amazing together.
How long does shipping take?
We typically process and ship stock products within 1–2 business days. Shipping times vary by location. Lead times for made-to-order and custom products are shown on each product page. For urgent orders, contact info@packqueen.com.au or call 03 8689 9344.
What payment methods do you accept?
We accept Visa and Mastercard, PayPal and direct deposit.
