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Free dieline template
Download PDF (310 x 230 x 105 mm)Full size with cut lines, crease lines and a 3 mm bleed. Keep text and logos 5 mm inside the lines. Or design online with our Free Custom Diecut Box Editor.
This brown die cut mailing box (B137) is 310 x 230 x 105mm inside, sized for A4 items. Cut from a single sheet of E-flute corrugated board, it folds into a sturdy postal box with tuck-in locking tabs, and the double-walled sides add extra protection in transit.
| Product code | B137 |
|---|---|
| Internal dimensions (L x W x H) | 310 x 230 x 105mm |
| Paper size fit | A4 |
| Box style | Die cut mailing box with tuck-in locking tabs |
| Colour | Brown |
| Board | E-flute corrugated board |
| Construction | Double-walled sides |
| Satchel fit | Australia Post Extra Large prepaid satchel |
| Recyclable | 100% recyclable |
| Certification | FSC certified |
| Pack size | 100 boxes |
| Guarantee | 90-day money-back guarantee |
Browse the full range of Brown Diecut Mailing Boxes.
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Free dieline template
Download PDF (310 x 230 x 105 mm)Full size with cut lines, crease lines and a 3 mm bleed. Keep text and logos 5 mm inside the lines. Or design online with our Free Custom Diecut Box Editor.

Sizing
Inside: 310 x 230 x 105mm (length x width x height)








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.
A4 documents, folders and books lie flat (A4 is 297 x 210mm), with 105mm of height for shoes, clothing, gift sets and bundles of products.
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.
Yes. This A4 size comes in white, brown, black, pinks, blues, green, red, purple, lavender and orange, in diecut, tuck-front and self-seal styles. Use the "Same size, more colours & styles" link above the description to see them all.
"Full" colour boxes (for example Full Black or Full Rose Pink) are printed the same colour inside and out, so the box looks finished the moment it's opened. Most other coloured boxes are coloured outside with a natural kraft inside.
Yes. The boxes are delivered flat in packs and fold into shape in seconds, so they take up very little shelf space.
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.
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.
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.
Order online and we'll usually have it ready in 15–30 minutes at either warehouse.
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