They arrived on time, and fitted my journal perfectly
Description
Superflat Mailing Box: 310 x 220 x 16mm A4 B297
This robust kraft corrugated cardboard mailing box measures 310 x 220 x 16mm, offering a superflat, protective solution engineered for efficient shipping. Designed with sustainability at its core, it features over 50% recycled fiber content and is fully recyclable, aligning with eco-conscious business practices.
- Dimensions: Precisely sized at 310 x 220 x 16mm, ideal for A4 items and qualifying as a Large Letter for optimal postal rates.
- Material: Constructed from durable, high-quality kraft corrugated cardboard for reliable product protection during transit.
- Recycled Content: Made with over 50% recycled fiber, giving waste materials a new life and reducing reliance on virgin resources.
- Recyclability: Fully recyclable paper composition ensures easy end-of-life processing and supports a circular economy.
- Certification: FSC Certified, guaranteeing that paper content originates from responsibly managed forests committed to ecological balance.
Compared to bulkier packaging alternatives, this superflat design significantly reduces shipping volume and associated carbon footprints, offering a more economical and environmentally friendly shipping option. Its rigid structure provides superior protection for contents, surpassing industry standards for lightweight yet secure mailers.
Key Technical Advantages: Technology and Performance
Engineered for both efficiency and protection, the B297 Superflat Mailing Box utilizes a self-locking design for quick assembly and secure closure without tape. Its flat profile optimizes storage space and handling, while the uncoated, natural matte finish presents a clean, professional, and eco-friendly aesthetic that resonates with environmentally aware consumers.
- Lay the flat box printed side down and fold up the side walls.
- Fold the side flaps in so the box holds its shape.
- Slide in your flat item: prints, cards, photos, a scarf or a folded tee.
- Close the lid and tuck the front flap into the front of the box.
- For extra security, seal the front flap with a strip of tape or a branded sticker.
- Free delivery to Sydney & Melbourne metro on orders over $500.
- $50 flat rate to Wollongong areas and $75 to Gosford & Newcastle areas (up to 2 tonne).
- Australia-wide delivery via Australia Post and trusted couriers.
- Free pickup from Minto NSW or Braeside VIC, Mon–Fri 9am–4pm.
- 90-day returns on unopened items. See our refund policy.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Sizing
What fits in this box
Inside: 310 x 220 x 16mm (length x width x height)
- A4 documents, folders and books lie flat
- Slim 16mm profile for flat items: prints, cards, photos, scarves and folded tees
- About 1.1 litres of space inside
- Delivered flat, folds into shape in seconds
- Sizes are inside measurements. Allow 5–10mm each side for tissue paper or bubble wrap.
- Not sure? Use the size finder below or call us on (02) 8750 5347.
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Size finder
Not sure of the size? Enter your item's dimensions.
Enter your item's measurements on the left, then press Search to see every size we stock that fits.
Nothing in stock fits that size.
Request a custom box quote
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Wholesale · Bulk packs
Buying in bulk? Pay less per box.
Order 1,000+ mailing boxes, or Australian-made shipping cartons by the pallet, and we'll quote a wholesale price. Trade accounts get invoice terms and a dedicated contact.
Questions about this box
What can I send in a superflat box?
Superflat boxes are about 16mm high inside, made for flat items: art prints, cards, photos, stickers, scarves, folded t-shirts, books and documents. They protect corners better than an envelope and stay thin and light to post.
Is the size inside or outside the box?
All sizes are internal (length x width x height), measured inside the box. The outside is a few millimetres bigger because of the board thickness.
How do I close the box?
Fold the box into shape, slide your item in, then close the lid and tuck the front flap into the front of the box. For extra security, seal the front flap with a strip of tape or a branded sticker.
Can I get this size in other colours?
Most superflat sizes come in white, brown, black, light blue and rose pink. Use the "Same size, other colours" link above the description to see every colour in this size.
Are the boxes delivered flat?
Yes. The boxes are delivered flat in packs and fold into shape in seconds, so they take up very little shelf space.
Can I print my logo on the box?
Yes. We make custom printed boxes from 1,000 units, usually in around 2 weeks. Get a quote. For smaller runs, a printed sticker or stamp on a plain box works well.
What does the pack size mean?
The pack size is how many boxes come in one pack, for example x100 is a pack of 100 boxes. "Number of packs" sets how many packs you get, so x100 with 2 packs is 200 boxes.
Can I return the boxes, or pick up my order?
Yes to both. We offer 90-day returns on unopened items (see our refund policy), and you can choose pickup at checkout and collect from Minto NSW or Braeside VIC, Monday to Friday 9am to 4pm.
Customer Reviews
Overall rating: 5.0 / 5 from 5 reviews.
Great for sending dvds, cd's and small posters.
I've found the whole process very positive.
Nice and fast shipping
Great product used to ship our items as letters - works well and great price
Need it today? Pick it up.
Order online and we'll usually have it ready in 15–30 minutes at either warehouse.
NSW
Sydney — Minto
Unit 2, 1 Swaffham Road, Minto NSW 2566
Mon–Fri 9am–4pm · Sat–Sun closed
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VIC
Melbourne — Braeside
21–23 Endeavour Way, Braeside VIC 3195
Mon–Fri 9am–4pm · Sat–Sun closed
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