Many parcel problems begin before an item is packed. The box is too large, the tape is unsuitable, or the shipping label is creased across a seam. Getting these details right affects both delivery costs and how well a parcel handles sorting belts, delivery vans and outdoor conditions.
This guide covers the essential packing supplies in a practical order: carrier rules, box size and strength, packaging tape, sealing and labelling.
The short version
- Check current limits before buying boxes. Australia Post applies maximum dimensions and weights to domestic and international parcels.
- Avoid unnecessary empty space. When you use your own packaging, charges may be based on actual or cubic weight, whichever is higher.
- Match the board to the load. Single-wall cartons suit many light goods, while double-wall cartons are useful for heavier, denser or more fragile items.
- Use packaging tape designed for cartons. Tape at least 48 mm wide is a practical choice for most corrugated boxes.
- Keep the label flat and clear. Tape, folds and marker lines should not cover the barcode.
Step 1: Check the Australia Post rules
Before choosing packaging, check the current Australia Post limits for the service you plan to use. Published domestic parcel limits generally include a maximum weight of 22 kg, a maximum length of 105 cm and a maximum volume of 0.25 cubic metres. International limits vary by service, destination and parcel dimensions, so confirm them before packing.
Pricing also depends on the packaging and service. Some Australia Post prepaid and flat-rate packaging is charged by size. If you use your own carton, the price may be based on actual weight or cubic weight, whichever is greater. Rates also move, with parcel price increases taking effect at the start of each financial year, so check the current schedule rather than an older quote.
Australia Post calculates cubic weight by multiplying the parcel's length, height and width in metres, then multiplying the result by 250. For example, a carton measuring 0.40 m by 0.30 m by 0.20 m has a cubic weight of 6 kg. Even if the contents weigh less, the parcel may be priced using that 6 kg figure.
This is why a needlessly large carton can increase shipping costs. Measure the packed parcel rather than relying only on the box's listed dimensions, since bulging sides or raised flaps can affect the final size.
Step 2: Choose the right box size and strength
Measure the item and allow enough room for protective wrapping and cushioning on every side. Choose the smallest carton that holds the item without forcing the flaps closed. A test pack can help you confirm that the contents don't move when the box is gently shaken.
Packee supplies regular slotted, cube and tall cartons in a range of sizes. If you already know the dimensions you need, you can shop cardboard packaging boxes online and compare the listed internal measurements, wall construction and recommended uses. Check whether dimensions are internal or external before ordering.
Single-wall corrugated board is commonly used for clothing, packaged food, small homewares and other light goods. Double-wall board has an additional fluted layer, giving it more resistance to crushing and punctures. It is worth considering for dense products, fragile contents, longer journeys or parcels likely to be stacked.
Step 3: Select suitable packaging tape
Start with tape width. Pressure-sensitive packaging tape at least 48 mm wide is suitable for most corrugated cartons. Wider tape can be useful for heavy boxes or broad seams. Office tape, painter's tape and masking tape do not provide the same hold and should not be used as the main seal.
Next, consider the adhesive. Acrylic tape is often chosen for parcels that may be stored for longer periods or exposed to light. Hot-melt tape has strong initial tack and works well in fast packing workflows, but some products perform less reliably in cold conditions. Natural rubber adhesive can grip rough or recycled cardboard more effectively. Temperature performance differs between products, so check the supplier's specifications if parcels will be kept in a cold room, hot warehouse or uninsulated vehicle.
Where to buy packaging tape without overpaying
Compare tape by roll length, width, adhesive type and carton quantity rather than looking only at the price per roll. A cheap roll may offer poor value if it is shorter, tears during use or requires several layers to hold a box closed.
Ozpack offers standard and heavy-duty packaging tapes along with handheld dispensers. If you prefer digital ordering, you can buy packaging tape online Australia to compare product specifications before choosing a carton quantity. Ozpack's range allows buyers to review tape and dispenser options together, which can simplify an initial order.
Step 4: Seal and label the parcel properly
The H-taping method uses one strip along the centre seam and one across each end seam, forming an H shape. Apply this pattern to both the top and bottom of the carton. Smooth the tape onto the cardboard so there are no loose ends or gaps.
Fill empty spaces with suitable material, such as paper, corrugated inserts or bubble cushioning. Avoid overfilling because bowed sides and raised flaps reduce the box's strength. For fragile or higher-risk goods, consider placing a wrapped item in a smaller box, then cushioning that box inside a larger carton.
Place the shipping label on a flat, uncluttered face. Keep it away from edges and seams, and don't cover the barcode with opaque tape or marker lines. Remove or fully cover old labels and barcodes when reusing a carton.
Common mistakes worth avoiding
- Using a box that is much too large and paying cubic weight for the empty space.
- Choosing a carton that is too weak for a dense or fragile item.
- Sealing a parcel with office, masking or narrow tape.
- Leaving space that allows the contents to move during transport.
- Running tape or marker lines across the shipping barcode.
- Treating a fragile sticker as a substitute for wrapping and cushioning.
- Buying only one box size and overpacking smaller orders.
Frequently asked questions
Which tape suits recycled cardboard or cold storage?
Natural rubber adhesive often grips rough or recycled board well and may suit cooler conditions. Some hot-melt tapes provide quick initial adhesion but are less suitable for cold storage. Product performance varies, so check the stated temperature range rather than relying only on the adhesive category.
Can I reuse cardboard boxes?
Yes, provided the board is dry, the corners are not crushed and the flaps still close properly. Remove or completely cover previous labels and barcodes. Retire boxes with soft panels, split seams, water damage or punctures.
Putting it together
A practical packing kit for many Australian senders includes two or three useful carton sizes, 48 mm to 75 mm packaging tape, a handheld dispenser, suitable cushioning and shipping labels. Packee is one option for comparing cartons, while Ozpack offers tape and dispenser choices. Start with the carrier rules, select packaging that fits the item, test the packed parcel and measure it before calculating the postage cost.
