Description
This Superflat Mailing Box is engineered for efficient and secure shipping, designed to perfectly fit standard letter gauges while protecting contents during transit.
- Compact Dimensions: Measuring 152 x 132 x 16mm, this box offers a slim profile ideal for sending documents, small electronics, or other flat items without unnecessary bulk.
- Rigid Construction: Crafted from durable, rigid material, it ensures your items remain protected from bending, crushing, and damage throughout the shipping process.
- Effortless Assembly: Featuring a self-locking design, this mailing box snaps together quickly and securely, eliminating the need for additional tape for closure.
- Sleek Black Finish: The professional black exterior presents a sophisticated look, enhancing the perceived value of the items shipped within.
- Model B280: This specific model is optimized for letter gauge compliance, simplifying postage calculations and ensuring consistent delivery.
Unlike flimsy envelopes or oversized boxes that require excessive void fill, this Superflat mailer provides precise protection. Its slim, rigid form factor significantly reduces shipping costs and handling issues compared to traditional packaging, making it an economical and reliable choice for e-commerce businesses.
- 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: 152 x 132 x 16mm (length x width x height)
- Slim 16mm profile for flat items: prints, cards, photos, scarves and folded tees
- About 0.3 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.
More superflat mailing boxes
Not sure of the size? Enter your item's dimensions.
Packing essentials
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.
Need it today? Pick it up.
Order online and we'll usually have it ready in 15–30 minutes at either warehouse.