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Standard Shipping Label Size — Complete Guide

The standard shipping label size is 4 inches wide by 6 inches tall (4×6), which is the universal thermal label format used by USPS, UPS, FedEx, and DHL worldwide. If you're printing on regular paper instead of a thermal printer, standard US letter paper (8.5×11 inches) works with labels printed at half-page (two labels per sheet) or full-page. Here's everything you need to know about shipping label dimensions for every carrier and format.

Step-by-step

1
4×6 inches — the universal thermal label standard
Every major carrier — USPS, UPS, FedEx, DHL, Canada Post, Royal Mail, Australia Post — accepts 4×6 inch labels as their standard format. Thermal label printers (Zebra, Rollo, DYMO LabelWriter 4XL, Munbyn) are designed specifically for this size. These labels come on rolls: 4" wide, 6" long per label, with a gap or black mark between labels. No ink cartridges — heat activates the label surface.
2
Letter paper (8.5×11 inches) — two options
If you don't have a thermal printer, print on standard US letter paper. Option 1: Full-page label — one label per page, occupying roughly the top half or full page. Option 2: Half-page (2-up) — two labels per page, each approximately 8.5×5.5 inches. Cut and tape or use label sheets. ShippingLabel.co generates both formats automatically.
3
A4 paper (210×297mm) — international standard
Outside the US, A4 is the standard office paper. A4 is slightly narrower and taller than US letter. Shipping labels formatted for A4 work the same way — one or two labels per sheet. International carriers including DHL, Royal Mail, Canada Post, Australia Post, and Correos all use 4×6 (100×150mm) thermal labels or A4 paper labels interchangeably.
4
Specialty sizes you may encounter
2×7 inches: address-only labels for small envelopes, common for First Class letters. 4×4 inches: used for some DHL domestic shipments. 4×8 inches: extended label for international shipments with customs info. 6×4 inches: same as 4×6 but oriented landscape — both orientations work, though most carriers default to portrait (tall) orientation.
5
What size is right for your shipment?
For 99% of packages: use 4×6 inches (thermal) or half-letter (paper). For small letter envelopes: check if your carrier accepts a reduced-size label. For international shipments: stick with 4×6 — it's the international standard accepted everywhere. Our label maker defaults to 4×6 thermal and also generates letter-size output for either orientation.

Good to know

•Label placement matters as much as size — attach the label to the flattest surface of the package, away from seams, edges, and tape. Barcodes must be readable by carrier scanners.
•Never cut into the barcode or any data zone of the label. Leave at least 1 inch of white space around the barcode edges.
•For thermal labels: if your printer is 4 inches wide but cutting labels at 4×4, check the print settings — the label height is set in the printer driver or label software, not the paper size.