🏷️ The 4×6 Inch (100×150mm) Shipping Label Standard
The 4×6 inch direct thermal label (101.6 × 152.4 mm) is the universal standard for commercial e-commerce logistics. Used across Amazon, Flipkart, Meesho, FedEx, DHL, and India Post, it provides the ideal surface area to display high-density Code128 barcodes, 2D QR codes, consignee addresses, and return instructions without consuming excess packaging space.
📐 Why "Fit-Width" Matters: Many shipping label PDFs have strange aspect ratios that leave huge white gaps on the left and right sides when scaled proportionally. LabelSlice's proprietary Fit-Width Engine expands the printable artwork to touch the exact edges of the 4-inch roll, making every barcode 25% larger and easier to scan.
4×6 Inch Thermal Label Technical Specifications
| Resolution | Dimensions (Pixels) | Dimensions (Points / mm) | Application |
|---|---|---|---|
| 203 DPI | 812 × 1218 px | 288 × 432 pt (101.6 × 152.4 mm) | Standard commercial printers (TVS, TSC, Xprinter) |
| 300 DPI | 1200 × 1800 px | 288 × 432 pt (101.6 × 152.4 mm) | High-definition industrial printers (Zebra, Citizen) |
| Core Size | 1 inch (25.4 mm) | Standard desktop roll core | Fits all desktop printer spindles |
| Paper Type | Direct Thermal Top-Coated | BPA-Free, Waterproof, Oil-Proof | Resistant to rain, scuffs, and friction during transit |
How to Format Labels for 4x6 Roll Printers
Upload Logistics PDF
Select or drop your shipping label PDF file into LabelSlice.
Select Thermal 4×6" Mode
Ensure the Thermal (Roll Printer) tab is active with 4×6" size selected.
Print at Full Width
Click Print Directly. The browser print dialog sends edge-to-edge stickers to your roll printer.
❓ Frequently Asked Questions (FAQ)
Q: What are the exact dimensions of a 4x6 shipping label in millimeters?
4x6 inches corresponds to exactly 101.6 mm × 152.4 mm (commonly rounded to 100 × 150 mm on thermal paper roll specifications).
Q: Why does LabelSlice have a Fit-Width mode?
Fit-Width scales the label horizontally so it touches both edges of the 4-inch wide roll, eliminating tiny, unreadable text and blank side margins.
Q: What DPI resolution is used for 4x6 labels?
Standard thermal printers print at 203 DPI (812 × 1218 pixels). High-definition models print at 300 DPI (1200 × 1800 pixels).
Q: What paper type is best for 4x6 shipping labels?
Direct Thermal Top-Coated paper with strong self-adhesive backing is recommended. It is waterproof, oil-resistant, and scratch-resistant during transit.