When you're buying packaging tape for the first time, or switching suppliers, tape width is one of those specs that's easy to overlook. Both 48mm and 75mm tape seal boxes. Both use the same adhesive chemistry. The difference is in how much surface area each strip covers, and that matters more than it sounds once you understand what tape is actually doing when it holds a box together.
This guide explains the practical difference between 48mm and 75mm packing tape, which one is right for different types of parcel, and when it's worth upgrading.
What does tape width actually affect?
Tape width determines how much surface area bonds to the box with each strip. A wider strip means more adhesive in contact with the cardboard, which gives the seal more resistance to peeling forces. When a box is lifted by its sides, stacked under other boxes, or compressed in a courier vehicle, the seal is under stress. Wider tape distributes that stress across a larger bonded area, which makes failure less likely.
Width also affects coverage speed on a packing bench. With 75mm tape you cover the flap join in fewer passes than with 48mm, which matters if you're sealing a high volume of boxes and every second counts.
What width does not affect is the adhesive strength per unit area. A 48mm tape and a 75mm tape from the same product range use the same adhesive at the same specification. The difference is purely in how much of that adhesive is applied per strip.
48mm packing tape
48mm is the standard width for packaging tape and the most widely used size across e-commerce, fulfilment and general parcel dispatch in the UK. It fits most tape dispensers without modification, it's available from every supplier at the most competitive pricing, and it works reliably on the vast majority of boxes sent through Royal Mail, Evri, DPD and other standard UK courier services.
For standard e-commerce parcels up to roughly 5 to 8kg, single wall corrugated boxes, and most everyday shipping applications, 48mm tape is all you need. Using the H-tape method correctly, three strips of 48mm tape per face gives a very strong seal that will hold through normal postal and courier handling.
Mr Bags stocks 48mm tape in four types, all on 92m rolls for fewer roll changes on busy packing benches:
- Clear packaging tape 48mm x 92m for branded or printed boxes where you don't want to obscure the surface
- Brown packaging tape 48mm x 92m for standard brown cardboard boxes and general dispatch
- Fragile tape 48mm x 92m for breakables and anything that needs a handling warning
- Brown kraft paper tape 48mm x 50m for eco and plastic-free packaging
We also stock a 24mm clear tape for lighter applications where a narrower strip is more practical, such as sealing small packets, attaching documents to the outside of boxes, or closing bags and envelopes.
75mm packing tape
75mm tape is 56 per cent wider than 48mm. That extra width makes a meaningful difference in two specific scenarios: heavy boxes and large boxes.
For heavy boxes, the seal is under more stress when the box is lifted and when it's stacked under other boxes in transit. A wider bond across the flap join gives more resistance to the seal opening under that load. This is particularly relevant for the base of the box, which bears the full weight of the contents every time it's moved.
For large boxes, the flap join is physically longer, which means more of the join is unsupported at the edges with a narrow tape. A 75mm strip covers more of the join width with each pass, which reduces the flex at the edges of the flap where peeling typically starts.
Mr Bags stocks 75mm tape in two options:
- Clear tape 75mm x 66m for large or heavy boxes where appearance matters
- Brown buff tape 75mm x 66m for large or heavy boxes where you want the tape to blend with the cardboard
Both use the same high-tack acrylic adhesive as the 48mm equivalents. The 75mm rolls are 66m rather than 92m, but because each strip covers more surface, roll consumption per box stays broadly comparable to the 48mm options on larger cartons.
48mm vs 75mm: which should you use?
Here's a straightforward guide by scenario:
| Scenario | Recommended width |
|---|---|
| Standard e-commerce parcel, up to 5kg | 48mm |
| Medium parcel, 5 to 10kg, single wall box | 48mm (H-tape method, base double-taped) |
| Heavy parcel, 10kg+, any box | 75mm |
| Large outer carton or shipping case | 75mm |
| Strong single wall or double wall box | 75mm |
| Fragile items in a correctly sized box | 48mm fragile tape, or 75mm for heavy fragile goods |
| Eco or kraft packaging | 48mm kraft paper tape |
| Pallet outers and bulk shipping cases | 75mm as a minimum; reinforced tape for very heavy loads |
Can you use 75mm tape for everything?
Technically yes, but it's not the most practical choice for lighter parcels. On small or medium boxes, 75mm tape is wider than the flap join needs, which means you're using more tape per box than necessary and potentially covering address labels or barcodes on smaller cartons. It's also slightly more expensive per roll than 48mm, so using it across all box sizes adds cost without adding meaningful benefit.
The most practical approach for a mixed shipping operation is to keep both widths in stock: 48mm for standard parcels and 75mm for heavy or large cartons. This keeps costs sensible and means you always have the right tool for the job without having to compromise.
Does tape width affect how much tape you get through?
In terms of roll coverage by box count, the difference is smaller than you might expect. A 92m roll of 48mm tape and a 66m roll of 75mm tape cover a broadly similar number of large cartons, because the wider tape completes the same sealing job in fewer strips. For small boxes, the 92m roll of 48mm tape goes considerably further because you only need a short strip per face.
For a fuller breakdown of coverage by box size, the tape usage guide covers the numbers in detail. It's worth reading alongside this if you're working out stock requirements for a packing operation.
What about dispenser compatibility?
Most standard hand-held tape dispensers are designed for 48mm tape. If you buy a 75mm roll and try to use it with a standard dispenser, it won't fit. Before switching to 75mm tape, check that you either have a dispenser rated for that width or are comfortable applying it without a dispenser on a flat surface.
Bench-mounted tape dispensers, which are common in warehouse and fulfilment environments, are usually adjustable and can handle both widths. If you're running a packing bench at any volume, a decent dispenser is worth having regardless of which width you use, as it speeds up the sealing process considerably and produces cleaner, more consistently applied tape.
A note on length as well as width
Width is one dimension; roll length is the other. A longer roll means fewer changes during a packing run, which matters on a busy bench. The 92m rolls in the 48mm range give you roughly 40 per cent more tape per roll than a standard 66m roll, and at Mr Bags the price difference between the two lengths is modest. For any business sealing boxes regularly, the 92m option is almost always the better value.
The 75mm tapes come in 66m rolls as standard. At that width, 66m still covers a significant number of large cartons per roll, and the reduced frequency of roll changes compared to using 48mm tape on large boxes is itself a time saving.
You can browse the full tape range, including all widths and lengths, on our packaging tape page. If you're not sure which option is right for what you're shipping, the product descriptions include guidance on recommended use cases for each tape.
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