Packing and shipping, faster

The unglamorous part where the margin actually is · Updated 15 July 2026

Nobody writes blog posts about packing. It is the least interesting part of e-commerce, and for most small sellers it is the part consuming the most hours and quietly setting the ceiling on how much the business can grow.

This guide is about getting those hours back and cutting the shipping bill.

Volumetric weight: the invisible cost

Start here, because it is the biggest shipping saving available and most sellers have never checked it.

Every platform charges on the greater of actual weight and volumetric weight. Volumetric weight is calculated from the box's dimensions. So a large light product — a cushion, a lampshade, a bulky toy — is billed as though it were much heavier than the scale says.

The implications are direct:

Measure your packed box, not your product. The bare product's weight is irrelevant. Right-size your boxes. Shipping a small item in a big box because that is the box you have is paying for air on every single order, forever. Find the slab boundaries. Shipping is charged in slabs. If your parcel is 520g and the slab boundary is 500g, you are paying the next slab for 20g. Lighter packaging, a smaller box, less filler — dropping under that line is a saving on every order you will ever ship.

This is worth an afternoon. Weigh and measure your top ten products as packed, check them against the slab table, and see how many are sitting just above a boundary. Usually several are.

The label workflow

Here is what most sellers do: download the label PDF, print it on A4, cut each label out with scissors, then open the invoice again to work out which product goes in which parcel.

For eighty orders that is an hour before a single box is packed, and it is where wrong shipments come from.

The problem is structural. Amazon's Easy Ship PDF alternates: label page, invoice page, label page, invoice page. The label page is a single image with no text in it. The SKU — the one thing you need to pack — exists only on the invoice page.

So the label tells you where the parcel is going but not what goes in it. Which is why you keep opening invoices.

The fix has three parts: Crop to thermal size. The label sits on an A4 page with white space around it. Print that A4 straight to a 4x6 roll and the printer shrinks the whole page, margins included — you get a tiny label with a barcode that scanners fight with. Cropping away the white space means the label fills the roll and the barcode scans first time. Put the SKU on the label. A tool that reads the invoice page's text can print the SKU and quantity onto the matching label. Now the parcel tells you what goes in it. Sort by SKU. This is the big one, covered below.

Our Amazon label cropper does all three, in your browser, without uploading your customers' addresses anywhere. There are equivalents for Flipkart, Meesho and Snapdeal, and a custom cropper for anything non-standard.

Sorting by SKU is the actual time saver

Cropping saves paper. Sorting saves your legs, and legs are what the hour is made of.

Unsorted, packing looks like this: walk to shelf, pick one item, walk back, pack it, walk to a different shelf, pick a different item, walk back. Eighty times. You are walking the length of your storeroom eighty times to pack eighty parcels.

Sorted by SKU: every order for the same product is together. Pick a stack of one product, pack them all, move to the next. You walk to each shelf once.

The second benefit is fewer mistakes. When you are packing twelve identical items in a row, you cannot put the wrong thing in the box. When you are switching products every parcel, eventually you will.

Thermal printing

If you are printing labels on A4 and cutting them out with scissors, a thermal printer will pay for itself faster than you expect.

Why: no ink, ever. No cutting. Labels come out at the right size, already adhesive. The consumable is just the roll. 4x6 is the standard roll for Indian marketplace labels. Whatever you buy, make sure it does 4x6. Direct thermal vs thermal transfer: direct thermal needs no ribbon and is what almost every seller wants. The print fades over months, which does not matter for a label that will be scanned within a week. Print one label first, always. Check the barcode scans and that nothing has been cut off, then send the batch. Discovering a problem after eighty labels is a wasted roll. One specific warning for Amazon sellers: the routing strip at the very bottom of the label — the block of codes and the "Sold on: www.amazon.in" line — is part of the label. There is a big blank gap above it, and simple croppers treat that gap as the end of the label and cut the codes off. Couriers can reject parcels missing that strip. Whatever tool you use, check the bottom row survived on your test print.

Packaging that survives

Indian logistics is rough on parcels. Packaging that would be fine elsewhere gets returned here as damaged, and a transit-damaged return is the most wasteful thing in your business — you paid to ship it out, you paid to ship it back, and you cannot resell it.

Do the arithmetic honestly. If better packaging costs ₹4 more per order and prevents one damaged return in fifty, and a damaged return costs you ₹300 all-in — that is ₹200 spent to save ₹300. It pays. But do not over-pack. Extra material is extra weight, and extra weight can push you into the next slab on every order. The optimum is the lightest packaging that survives, not the strongest. Fragile items need corner protection, not more filler. Drops land on corners. Poly bags for soft goods. Lighter and smaller than a box, which helps on both weight and volumetric weight.

The workflow that scales

Download all labels for the day at once. Not order by order.
Crop, stamp the SKU, and sort by SKU in one pass. Our croppers do this in a few seconds for a hundred orders.
Print the batch after a single test label.
Pack by SKU groups. All of one product, then the next.
Weigh a sample against the slab table occasionally. Packaging changes creep.
Keep invoices as a separate file if you need them, rather than interleaved with the labels.

None of this is clever. It is just the difference between a two-hour packing session and a one-hour one, every day, forever — which over a year is the single largest amount of time you will get back from anything on this website.

Frequently asked questions

What is volumetric weight and how do I reduce it?

Volumetric weight is calculated from your package's dimensions rather than the scale. Platforms charge on whichever is greater — actual or volumetric. Reduce it by right-sizing boxes, using poly bags for soft goods, and cutting unnecessary filler. Check whether your parcels sit just above a slab boundary.

Do I need a thermal printer to sell online?

No, but if you are printing labels on A4 and cutting them out, one will pay for itself quickly — no ink, no cutting, correct size, adhesive labels. 4x6 is the standard roll for Indian marketplace labels.

Why do my Amazon labels print too small on a thermal printer?

Because the label sits on an A4-sized page with white space around it, and the printer shrinks the whole page to fit the roll. Crop away the white space first so the label content itself fills the 4x6 area, and the barcode prints at full size.

Why does the SKU not appear on my Amazon shipping label?

Because Amazon's label page is a single image with no text in it. The SKU lives on the tax invoice page, which is a separate page in the same PDF. A tool that reads the invoice page can print the SKU onto the matching label.

Is direct thermal or thermal transfer better for shipping labels?

Direct thermal for almost every marketplace seller — no ribbon needed, lower running cost. The print fades over months, which is irrelevant for a label scanned within days.