I post a lot of comics that I sell using the flat pack mailer. It's great for 3 to 5 comics or graphic novels and my customers are always very happy with the quality of the packaging.
Description
Securely package your items with this Superflat White Postal Box, designed for efficient shipping and superior protection. Crafted from durable corrugated cardboard, it offers exceptional quality at a great value.
- Dimensions: 270 x 220 x 16mm (internal), ideal for Large Letter postal services.
- Material: High-quality kraft corrugated cardboard with over 50% recycled fiber.
- Color: Crisp white exterior with a natural brown interior.
- Style: Self-locking, die-cut folding design for easy assembly and secure closure.
- Sustainability: Made from 100% recyclable materials and certified FSC.
This Superflat mailing box provides a significant advantage over standard packaging, offering a rigid, protective structure that fits within the Royal Mail Large Letter dimensions (up to 260x360mm and 20mm thick, under 500g). Its refined, ultra-slim profile ensures cost-effective postage without compromising on the safety of your goods, making it perfect for high-efficiency packing and sending.
- 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: 270 x 220 x 16mm (length x width x height)
- Slim 16mm profile for flat items: prints, cards, photos, scarves and folded tees
- About 1.0 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: 4.7 / 5 from 3 reviews.
Great!
I sell comics on ebay and use both sizes for different purposes. Neither is the perfect size, so I have to trim one down to 270x180 and cut off one of the end tabs, and for the other one add extra packing. It would be great if you could make one 273x180x16. I would think a lot of comic sellers would be interested in that one. They generally don't have time to make the alterations that I do.
Gud quality
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
Get directions
VIC
Melbourne — Braeside
21–23 Endeavour Way, Braeside VIC 3195
Mon–Fri 9am–4pm · Sat–Sun closed
Get directions
Talk to our team
Call us on (02) 8750 5347
Fast delivery Australia-wide
Via Australia Post and trusted couriers
Pickup in Sydney & Melbourne
Minto NSW and Braeside VIC
90-Day Returns
On unopened items