One of the most common questions we get from new customers: “What size labels do I order for my printer?” This guide gives you the answer for every common Sri Lankan use case.
Why Label Size Matters
Order the wrong size and your labels won’t feed through the printer correctly — causing jams, wasted media, and frustration. Most barcode printers auto-calibrate to detect the label gap, but only within their supported width range.
Two dimensions to know:
- Width — how wide the label is (must be within your printer’s range)
- Length (height) — how tall the label is (most printers support any length within reason)
Standard Label Sizes Used in Sri Lanka
30 × 20 mm — Small Product Tags
The most common size for pharmacies, jewellers, and small product labels. Fits a barcode, product name, and price on a tiny label.
Used by: Pharmacies, jewellers, small retail.
Compatible printers: Any printer with 20mm+ width (all Niimbot, XPrinter, Rongta models).
40 × 20 mm — Standard Retail Price Tag
The most popular label size in Sri Lankan retail. Fits a barcode, product code, name, and price clearly. Widely available in bulk packs.
Used by: Supermarkets, general retail, hardware stores, electronics shops.
Compatible printers: All models (XP-365B, XP-360B, Rongta RP400H, TSC TE200, Zebra ZD230).
40 × 30 mm — Medium Retail Label
A bit taller, which gives you room for more product information — useful if your product names are long.
Used by: Pharmaceutical products with dosage info, garments with size/colour details.
50 × 30 mm — Product Info Label
Wider and taller — good for labels with multiple lines of text, or for products that need both a barcode and extra details like expiry date or lot number.
Used by: Food manufacturers, pharmacies, importers.
58 × 40 mm — Shelf Edge Label
A common size for shelf-edge price labels in supermarkets and hardware stores.
Used by: Supermarkets, wholesale shops, hardware stores.
100 × 50 mm — Larger Product Label
For products that need a prominent barcode, large text, and extra information. Common in wholesale and warehouse environments.
Used by: Warehouses, importers, electronics retailers.
100 × 150 mm (4 × 6 inch) — Shipping Label
The standard size for shipping labels used by Sri Lankan courier services including Presto, Kapruka, and international couriers like DHL and FedEx. Requires a 4-inch printer (XPrinter XP-420B or similar).
Used by: E-commerce sellers, warehouses, importers/exporters.
How to Know If a Label Roll Fits Your Printer
Check your printer’s maximum label width in the specifications:
| Printer | Max Label Width |
|---|---|
| Niimbot B1 | 50 mm |
| Niimbot B3S | 75 mm |
| XPrinter XP-365B | 80 mm |
| XPrinter XP-360B | 82 mm |
| TSC TE200 | 112 mm |
| XPrinter XP-420B | 115 mm |
| Rongta RP400H | 108 mm |
| Zebra ZD230 | 114 mm |
Your label width must be equal to or less than the printer’s maximum. The label length can be almost anything.
Direct Thermal vs Thermal Transfer Labels
Make sure you order the right type of media:
- Direct thermal labels — used in direct-thermal-only printers (Niimbot B1, B3S, XP-365B, XP-360B, XP-420B). These labels turn black when heated. No ribbon needed.
- Thermal transfer labels — used with thermal transfer printers (Rongta RP400H, TSC TE200, Zebra ZD230). These labels require a ribbon to print. They are more durable.
Ordering thermal transfer labels for a direct thermal printer (or vice versa) will result in blank output.
Where to Order Label Rolls in Sri Lanka
Invenova supplies compatible label rolls for all printer models we sell. Available in bulk packs for high-volume businesses.
If you’re unsure which size or type to order, WhatsApp us and we’ll confirm the right spec for your printer model.