Short answer
A DT roll is a roll of direct thermal labels: heat-sensitive sticker labels that a thermal printer prints on without ink or ribbon. Online sellers use them for shipping labels. 4×6 inch is the standard size for Amazon, Flipkart and Meesho shipping labels, 4×4 and 3×5 suit smaller cropped labels or courier slips, and 4×1 rolls are used for barcode and SKU stickers.
If you've bought a thermal printer, the next thing you'll search is “DT roll”. Here's what it is, which size to buy and how to avoid the common mistakes.
What “DT” means
DT stands for direct thermal. The label paper has a heat-sensitive coating. The printer's head heats tiny dots on it and they turn black. No ink, no toner, no ribbon. That's why thermal printers are cheap to run.
The other type is TT (thermal transfer): the printer melts ink from a wax or resin ribbon onto the label. TT labels last longer and resist heat and sunlight, so they're used for product barcodes that must last years. For shipping labels that only need to last a few weeks, DT is the norm.
DT vs TT at a glance
| DT (direct thermal) | TT (thermal transfer) | |
|---|---|---|
| Ribbon needed | No | Yes (wax or resin) |
| Cost per label | Lower | Higher |
| Life | Months; fades with heat and sunlight | Years |
| Best for | Shipping labels, courier slips | Product barcodes, warehouse labels |
DT roll sizes and what they're for
| Size (inch) | Approx. mm | Use |
|---|---|---|
| 4 × 6 | 100 × 150 | Standard shipping label for Amazon, Flipkart, Meesho, Shiprocket |
| 4 × 4 | 100 × 100 | Smaller courier labels, cropped labels without the invoice part |
| 3 × 5 | 75 × 125 | Compact shipping labels, some courier and aggregator formats |
| 4 × 1 | 100 × 25 | Barcode, SKU and price stickers |
If you're unsure, buy 4×6. It fits every major marketplace label, and Amazon asks for labels of at least 4×6 inch. Use 3×5 or 4×4 only if your label source prints at that size or you crop to it.
How to check a DT roll before buying
- Core size: most desktop printers take a 1 inch (25 mm) core. Check your printer.
- Roll outer diameter: must fit inside the printer. Larger rolls may need an external holder.
- Labels per roll: 400–500 labels on a 4×6 roll is common for desktop printers.
- Gap or black mark: most rolls have a gap between labels so the printer's sensor can find each label.
- Scratch test: scratch the label with a fingernail. Thermal paper leaves a dark line. If nothing shows, it's not DT.
Getting clean prints
Load the coated side facing the print head, calibrate after every new roll and set the paper size to the label size with zero margins. The step-by-step is in thermal label roll setup. Crop marketplace PDFs to 4×6 with the free label cropper, and print SKU stickers with the SKU barcode label maker.
Choosing a printer? See the 4×6 thermal label printer guide.
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Frequently asked questions
What is a DT roll?
A roll of direct thermal labels: heat-sensitive sticker labels that a thermal printer prints on without ink or ribbon, mostly used for shipping labels.
What is the difference between DT and TT labels?
DT labels print with heat alone and fade over months. TT labels need a wax or resin ribbon and last for years.
Which DT roll size is used for Amazon, Flipkart and Meesho?
4×6 inch (100×150 mm) is the standard shipping label size for all three.
What is a 3×5 DT roll used for?
Compact shipping labels and courier formats that print at 3×5 inch, or cropped labels at that size.
How do I know if a label is direct thermal?
Scratch it with a fingernail. Direct thermal paper leaves a dark mark.
Read next
- Thermal Label Roll Setup: Load, Calibrate and Fix Skipping LabelsThermal label roll setup step by step: loading the roll, calibrating the gap sensor, driver paper size, and fixes for blank or skipping labels.
- 4x6 Thermal Label Printer: A Buying Guide for Indian SellersHow to choose a 4x6 thermal label printer for Meesho, Flipkart and Amazon labels: direct thermal, 203 dpi, roll size, connection and running cost.
- Shipping Label Printer for Amazon Sellers in IndiaWhich label printer Amazon Easy Ship and Self Ship sellers in India need, how to print Amazon labels on 4x6 rolls, and where to stick them.
- What Is “Mark RTD” in Flipkart? Ready to Dispatch ExplainedMark RTD in Flipkart means marking an order Ready to Dispatch. When to do it, the steps before it, the dispatch-by deadline and how to avoid RTD breaches.