Description
Introducing the Self-Sealing Mailing Box 310x230x105mm B141 - the ultimate solution for hassle-free packaging! Designed to meet the needs of office use and high-end applications, this mailing box features two self-sealing strips that eliminate the need for plastic tape, making packing quick and easy. The unique tuck front design ensures a secure and professional look while offering maximum strength.
Crafted from high-quality materials, the mailing box B141 is durable and strong. The perfect A4 size, 310 x 230 x 105mm, makes it perfect for most daily packing. Say goodbye to the mess and hassle of traditional packaging methods. The easy-to-use seals gives a professional look to your shipments, ideal for office use and high end pack and send demands.
Click Here for the more our Self Sealing Ecommerce Mailers .
Key Features
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Dual Self-Sealing Adhesive Strips: Features two integrated peel-and-seal strips—one for rapid, tape-free outgoing packing and a second strip to facilitate effortless customer returns.
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A4 Footprint with Extra Depth: Generous 310 x 230 x 105mm dimensions comfortably fit A4 literature, stacked merchandise bundles, and bulkier retail items without extra void fill.
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Superior Front-Tuck Protection: Double-walled side panels fold into a durable, crush-resistant structure to safeguard fragile goods against transit impact.
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Premium Unboxing Experience: The tuck-front lid opens smoothly to present products neatly, creating a high-end, professional presentation upon delivery.
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Rapid, Efficient Fulfillment: Eliminates extra tape handling to speed up packing lines—simply peel, press, and dispatch in seconds.
Product Specifications
| Feature | Details |
| Model / SKU | B141 |
| Internal Dimensions | 310mm x 230mm x 105mm |
| Compatible Size | Fits A4 items with 105mm depth |
| Box Style | Self-Sealing / Front-Tuck Die-Cut |
| Closure Type | Dual Peel-and-Seal Strips (Outgoing + Return) |
| Flute Type | Fine Corrugated Flute |
| Color & Finish | Natural Brown / Kraft Exterior & Interior |
| Material & Eco | 100% Recyclable Corrugated Board |
| Guarantee | 90-Day eBPak Guarantee |
Ideal Applications
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A4 books, thick document binders, planners, stationery sets, and catalog bundles
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Cosmetics hampers, skincare gift sets, candle jars, and beauty kits
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Apparel bundles, shoes, folded clothing, tech goods, and general e-commerce dispatches
- Lay the flat box printed side down and fold up the two long side walls.
- Fold the side flaps in (or push the locking tabs into the slots in the base, on diecut styles).
- Fold up the back wall, then pack your items. Add tissue paper or bubble wrap for fragile pieces.
- Close the lid and tuck the front flap into the front of the box.
- Self-seal styles have an adhesive strip on the flap. On other styles, seal the front flap with a strip of tape or a branded sticker for heavier items or extra security.
- 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 230 x 105mm (length x width x height)
- A4 documents, folders and books lie flat
- About 7.5 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 310 x 230 x 105mm 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 fits in a 310 x 230 x 105mm box?
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.
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.
Can I get this size in other colours or styles?
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.
What does "Full" or "Premium" colour mean?
"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.
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.