How to Create Shipping Labels for a 4x6 Thermal Printer for Free
The correct label size, the printer settings that matter, and a free browser tool to generate 4x6 labels for your own orders.
1. Why 4x6 Thermal Labels Are the Seller Standard
A thermal printer prints with heat instead of ink, so there are no cartridges to buy. A ₹6,000–₹10,000 printer plus a roll of labels replaces A4 printing, scissors and tape. For a seller packing 30+ orders a day, that saves time on every parcel. Here is how to create shipping labels for a 4x6 thermal printer for free, from label size to printer settings.
Couriers and marketplaces in India have largely standardised on the 4x6 inch label because it holds the address, barcode, AWB and COD details at a size scanners read reliably.
2. Shipping Label Size for Thermal Printer
For shipping labels, buy 100 × 150 mm direct thermal labels — on rolls for desktop printers or fan-fold stacks for high volume. Direct thermal labels need no ribbon. Most entry-level printers print at 203 DPI, which is enough for courier barcodes.
| Label size | Millimetres | Typical use |
|---|---|---|
| 4 × 6 inch | 101.6 × 152.4 mm (sold as 100 × 150 mm) | Courier shipping labels — the standard |
| 4 × 4 inch | ~100 × 100 mm | Small parcels, some courier formats |
| 2 × 1 inch | ~50 × 25 mm | Product barcodes and SKU stickers |
3. Create 4x6 Shipping Labels for Free
Marketplace orders (Amazon, Flipkart, Meesho) come with labels generated by the marketplace — use those for marketplace shipments. For your own website, Shopify, Instagram or WhatsApp orders, you need to create the label yourself.
The free Invoice & Shipping Label Generator on ecommercetool.io builds a 4x6 label from an order you have logged: sender and receiver address, order number, COD/prepaid badge, item summary, GSTIN and a scannable barcode.
Customer names and addresses stay in your browser. The label is rendered on your device and is never uploaded to a server.
4. How to Print a Shipping Label on a Thermal Printer
Printer settings that prevent blank and cut-off labels
That is almost always calibration or paper size. Re-run the gap calibration and make sure the driver paper size matches the label exactly — a 4x6 label printed on an A4 page setting will shrink or split.
5. Troubleshooting Common Thermal Label Problems
| Problem | Likely cause | Fix |
|---|---|---|
| Blank label comes out | Labels loaded upside down, or not direct thermal | Flip the roll; check labels are direct thermal |
| Print is tiny in a corner | Browser printing to A4 | Select 100 × 150 mm paper, scale 100% |
| Every second label is blank | Gap sensor not calibrated | Run calibration |
| Barcode does not scan | Scaled print or low darkness | Print at 100% and raise darkness slightly |
| Text faded | Darkness / heat too low | Increase darkness in driver settings |
6. Key Takeaways
Frequently asked questions
What size is a 4x6 shipping label?
4 × 6 inch is 101.6 × 152.4 mm. Labels are usually sold as 100 × 150 mm direct thermal labels.
Why does my thermal printer print blank labels?
Usually the roll is loaded upside down, the labels are not direct thermal, or the gap sensor needs calibration. Flip the roll, check the label type and run calibration.
Can I use this tool for Amazon, Flipkart or Meesho labels?
Marketplace orders come with labels generated by the marketplace, so use those. The free generator is for your own direct orders, such as website, Shopify, Instagram or WhatsApp sales.
Do thermal labels need ink?
No. Direct thermal printers print with heat, so there are no cartridges or ribbons to buy.
Free tools for this guide
- GST Invoice & Shipping LabelFree GST tax invoice generator for ecommerce: HSN/SAC codes, CGST/SGST or IGST breakup and amount in words, plus 4x6 thermal shipping labels. No signup.
- OrdersFree ecommerce order management for small sellers: track every order from pending to delivered or returned, linked to dispatches. Data stays in your browser.
- Barcode & SKU LabelsFree barcode generator for ecommerce in India: Code 128, EAN-13, Code 39 and UPC-A SKU labels for thermal rolls or A4 sticker sheets. Print-ready, no signup.
Try it with your own numbers
Open the free seller dashboard: no signup, no fees, and your data stays in your browser.
Open the free dashboard