Description
The B20 is a white shipping carton with an internal size of 320 x 240 x 160mm, sized for A4 items. It is white on the outside with a natural brown interior. Made from E-flute corrugated board in a regular slotted carton (RSC) style, it folds flat for storage and seals with packing tape for strong, everyday protection in transit.
Key Features
- Regular slotted carton (RSC): A classic shipping carton design that ships flat, folds up quickly and seals with packing tape.
- E-flute corrugated board: A thin, strong flute that keeps the carton light, helping keep postage costs down.
- White outside, brown inside: A clean white exterior that looks professional and suits labels and branding stickers.
- Internal size 320 x 240 x 160mm (A4): Measured inside the carton, suited to A4 documents, books, folded clothing and multi-item orders.
- Fits an AusPost Extra Large prepaid satchel: Sized to fit inside an Australia Post Extra Large prepaid satchel.
- 100% recyclable and FSC certified: Made from 100% recyclable corrugated board from FSC-certified sources, so it can go straight into paper recycling.
- 90-day money-back guarantee: Backed by the eBPak 90-day money-back guarantee.
Specifications
| Product code | B20 |
|---|---|
| Internal dimensions (L x W x H) | 320 x 240 x 160mm |
| Paper size fit | A4 |
| Box style | Regular slotted carton (RSC) |
| Colour | White outside, brown inside |
| Board | E-flute corrugated board |
| Country of manufacture | Imported |
| Satchel fit | Australia Post Extra Large prepaid satchel |
| Recyclable | 100% recyclable |
| Certification | FSC certified |
| Pack size | 100 cartons |
| Guarantee | 90-day money-back guarantee |
Ideal For
- E-commerce orders and online-store dispatch
- A4 documents, books and stationery
- Folded clothing and multi-item orders
- Small business and warehouse shipping
Custom Sizes, Made in Australia
Need a different size? We also produce regular slotted cartons locally in Australia, made to your exact dimensions — from 1,000 units, with a turnaround of around 2 weeks. Get a quote for custom boxes and cartons.
Browse the full range of White Regular Boxes.
- Open the flat carton into a tube.
- Fold in the two short bottom flaps, then the two long flaps.
- Tape along the bottom seam with 48mm packaging tape. For heavy items, also tape across both ends (H-taping).
- Pack your items and fill any gaps with void fill or bubble wrap.
- Close the top flaps the same way and tape the seam.
- 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: 320 x 240 x 160mm (length x width x height)
- A4 documents, folders and books lie flat
- Fits inside an Australia Post Extra Large prepaid satchel
- About 12.3 litres of space inside
- Delivered flat, folds into shape in seconds
- Sizes are inside measurements. Allow 5–10mm each side for bubble wrap or padding.
- Not sure? Use the size finder below or call us on (02) 8750 5347.
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Packing essentials


















Buy in bulk. Pay less per box.
Australian-made cartons in bulk quantities, from $0.87 a box. Trade accounts get invoice terms and a dedicated contact.
Questions about this box
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.
What does the pack size mean?
The pack size is how many boxes come in one pack, for example x25 is a pack of 25 boxes. "Number of packs" sets how many packs you get, so x25 with 2 packs is 50 boxes.
Are the boxes delivered flat?
Yes. Regular cartons are delivered flat to save space and fold into shape in seconds.
How do I seal the box?
Use 48mm packaging tape along the top and bottom seams. For heavy items, also tape across both ends. See "How to fold & seal" above.
Can I return the boxes?
Yes. We offer 90-day returns on unopened items. See our refund policy.
Can I pick up my order?
Yes. Choose pickup at checkout and collect from Minto NSW or Braeside VIC, Monday to Friday 9am to 4pm.
Can you make a custom size?
Yes. Custom cartons start from 1,000 units and take around 2 weeks. Get a quote.
Do you offer bulk pricing?
Yes. Bigger packs cost less per box, and pallet quantities cost less again. See our bulk deals.
Need it today? Pick it up.
Order online and we'll usually have it ready in 15–30 minutes at either warehouse.















