Shipping Costs Went Up Again! Here’s Why Smart Brands Are Rethinking Their Mailer Strategy

If you ship products for a living, you probably didn’t need an announcement to know this:

Shipping got more expensive again.

2025 brought another round of carrier adjustments fuel surcharges crept up, dimensional weight thresholds tightened, and fulfillment costs quietly climbed across the board. For many eCommerce brands, margins that were already under pressure got squeezed even further.

What’s interesting isn’t that shipping costs increased.

It’s how smart brands are responding.

They’re not just negotiating rates.

They’re not just switching carriers.

They’re rethinking something most brands haven’t touched in years:

their packaging strategy.

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Shipping Costs Don’t Rise in Isolation

When carriers adjust pricing, it’s rarely a single lever.

In early 2025, several forces converged at once:

• Fuel price volatility tied to global energy markets
• Continued emphasis on dimensional weight pricing
• Higher surcharges for oversized and inefficient packages
• Tighter enforcement of “billable weight” thresholds

According to industry data from Pitney Bowes and ShipMatrix, average parcel shipping costs rose between 5–7% year-over-year in early 2025, even before peak season surcharges are factored in.

For brands shipping hundreds or thousands of orders per month, that kind of increase isn’t theoretical it shows up immediately on the P&L.

And it’s forcing a long-overdue question:

Are we paying more to ship the product or to ship the packaging?

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The Problem With Looking Only at Unit Cost

For years, packaging decisions were often made based on one number:

Cost per unit.

Poly mailers looked cheap.

Boxes felt familiar.

Defaults stayed in place.

But shipping inflation has exposed a flaw in that thinking.

Because unit price is rarely the biggest cost driver anymore.

The real cost lives in:

• Dimensional weight
• Empty space
• Overboxing
• Inefficient shapes
• Excess materials

In many cases, brands are paying more to ship air than product.

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Dimensional Weight Is Doing the Real Damage

Most major carriers now price shipments based on dimensional (DIM) weight, not actual weight. That means size matters more than ounces.

Here’s where packaging choice becomes critical.

Boxes even small ones create rigid volume.

Overboxing compounds it.

Void fill adds thickness.

Every extra inch increases billable weight.

Flexible, right-sized mailers behave differently.

They conform to the product.

They reduce unused space.

They ship flatter and denser.

According to UPS and FedEx dimensional pricing guidelines, reducing package volume by even 1–2 inches in one dimension can move a shipment into a lower pricing tier—saving dollars per order, not cents.

Multiplied across thousands of shipments, that adds up fast.

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Why Mailers Are Beating Boxes Again in 2025

This isn’t the first time mailers have had a moment but 2025 conditions are making their advantages clearer than ever.

Right-sized mailers outperform boxes because they:

• Reduce dimensional weight
• Eliminate void fill
• Pack faster at fulfillment
• Store more efficiently
• Lower material usage

For apparel, accessories, personal care, books, and other soft or semi-rigid goods, boxes often add cost without adding protection.

And as shipping rates climb, brands are re-evaluating whether “default box packaging” still makes sense or if it’s just habit.

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The Hidden Cost of Default Packaging Decisions

One of the most expensive mistakes in eCommerce isn’t a bad decision.

It’s an unchallenged one.

Many brands are still using the same packaging they chose years ago before:

• DIM pricing became stricter
• Fuel surcharges became volatile
• Sustainability expectations increased
• Returns costs ballooned

Those defaults quietly lock in inefficiencies.

According to a 2024 NRF logistics study, packaging inefficiencies contribute up to 15% of avoidable fulfillment costs for mid-sized eCommerce brands.

That’s not because brands are careless it’s because packaging is often treated as an afterthought once it “works.”

Shipping inflation is forcing brands to revisit that assumption.

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Packaging as a Lever for Total Landed Cost

The most effective brands today aren’t asking,

“Which mailer is cheaper?”

They’re asking,

“What does this choice do to total landed cost?”

That includes:

• Carrier fees
• Fuel surcharges
• Damage and returns
• Labor and packing time
• Storage and handling
• Customer experience

When evaluated that way, packaging becomes a strategic lever—not a commodity.

And that’s where engineered paper mailers are gaining traction.

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Why Paper Mailers Are Part of the Rethink

Paper mailers—especially modern, fiber-based designs offer a balance that many brands are looking for right now:

• Structure without rigidity
• Protection without overboxing
• Right-sizing without complexity

They ship flatter than boxes.

They provide more consistency than thin poly.

They integrate easily into existing workflows.

And as a bonus, they also align with sustainability goals that many brands are already under pressure to address.

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Where TerraBoard Fits In

At TerraBoard, we see this shift happening every day.

Brands come to us not because they’re chasing trends—but because shipping costs forced them to take a closer look at their packaging math.

They want:

• Predictable dimensions
• Durable mailers that reduce damage
• Less wasted volume
• Materials customers recognize and trust
• A way to cut shipping costs without cutting corners

TerraBoard mailers are designed to support exactly that—right-sized, recyclable paper mailers engineered for real-world shipping conditions.

For many brands, the switch isn’t dramatic.

It’s practical.

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The Rethink Has Already Started

Shipping costs aren’t going back down anytime soon.

Fuel volatility, carrier pricing models, and dimensional enforcement aren’t temporary disruptions—they’re structural changes.

The brands adapting fastest aren’t waiting for another increase.

They’re questioning the defaults that quietly inflate every shipment.

Packaging may not be the most exciting line item but in 2025, it’s becoming one of the most powerful.

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Want to See What a Smarter Mailer Strategy Looks Like?

If you’re reviewing shipping costs and wondering where to start, packaging is one of the easiest places to test change.

👉 Request a TerraBoard Sample Pack

Compare right-sized paper mailers in your own fulfillment workflow and see how small changes affect shipping, handling, and presentation.

Because when shipping goes up again and it will, the brands that already adapted won’t feel it the same way.