Standard Shipping Label Size and How to Choose Thermal Labels

Common Shipping Label Sizes and Where They Are Used

Two things follow from that table. First, 4 x 6 thermal stock covers the label-printer format of every major US seller platform. Second, the format is chosen in the platform before you print: eBay states the label size “can only be adjusted before purchasing the label,” and Etsy formats only USPS labels for 4 x 6 printers (set under Settings > Shipping settings > Shipping Label Options).

4 x 6 labels for a laser or inkjet printer. Desktop printers use the letter format. Print it on plain paper and tape it on, on a full-sheet label, or use the USPS two-per-page option. Single 4 x 6 sheet labels made for laser and inkjet printers, such as Avery 5292, also exist, but only use them if your printer can feed a 4 x 6 sheet and your software outputs a 4 x 6 page.

Direct Thermal or Thermal Transfer

Use direct thermal labels for shipping. They need no ink, toner or ribbon, and Zebra names shipping labels as an ideal direct thermal application because the image only has to last a short time. The trade-off, per Zebra, is that direct thermal print darkens with too much heat or light and is not suited to long sunlight exposure or abrasion. Many 4 x 6 desktop shipping printers are direct thermal only; Rollo, for example, states that thermal transfer labels “need a ribbon, which Rollo does not use, so they will not print.”

Use thermal transfer labels with a matching ribbon only when the label must survive heat, sunlight, abrasion or years of storage, for example on equipment or long-held inventory. That needs a printer with a ribbon mechanism.

Match the Labels to Your Printer

The 4 x 6 face size is only the start. Check these against your printer’s manual or support page before ordering:

• Width range. The printer must accept a 4-inch-wide label. A 2-inch-class printer cannot; the roll size guide lists the width, core and roll limits by printer.
• Sensing. Many desktop printers find each label by the gap or perforation between labels. Rollo, for example, says to use labels with a gap or perforation, avoid black-mark or punch-hole stock, and avoid clear film labels its sensor cannot detect.
• Roll or fanfold. Fanfold stacks feed from behind the printer. Rolls must fit the printer’s core and outside-diameter limits, or sit in an external holder; Rollo suggests placing a roll 2 to 3 inches behind the printer or using a roll holder. The roll size guide covers core and diameter.
• Adhesive. Label spec sheets list a minimum application temperature separately from the service temperature range (Zebra’s Z-Perform 1000D sheet is an example). A label that survives cold after it bonds may not stick if you apply it to a package that is already cold or damp, so check the application temperature if you pack in a cold space.

Which 4 x 6 labels to buy for your printer

Price the required stock at your monthly volume. DYMO 5XL authentic-label recognition and Brother DK-format compatibility are different requirements, not evidence of identical electronic lock-in. See the best 4x6 printers for a small shipping station for how that plays into the printer choice.

Platform names can group 4 × 6, 100 × 150 mm and A6 (105 × 148 mm), but those physical dimensions differ. Match the actual stock, page and supported template; do not assume the names are exact conversions.

Are 3 x 5 labels big enough for shipping?

Do not shrink a standard 4 x 6 carrier label onto 3 x 5 stock. Use a smaller format only when the selected carrier/platform explicitly supplies and supports it. Reducing a 4 x 6 file to a three-inch width scales it to 75 percent. USPS’s barcode standard (DMM 204, 2.2.5) asks for narrow bars of at least 0.013 inch, with 0.015 to 0.017 inch preferred; a preferred-range bar shrinks to about 0.011 to 0.013 inch at 75 percent, at or below the minimum. Use 3 x 5 stock only for return-address, contents or branded labels you design at that size. If the package is too small for a 4 x 6 label, use a bigger mailer: USPS says the label must sit fully on one face and not fold over an edge.

Print a Test Label Before Paid Labels

After changing stock, follow the exact model’s loading and sensing procedure; Brother DK loading and DYMO recognition are not the same as Zebra or Rollo calibration. On a Rollo, Rollo’s instructions are to hold the top button until one beep, then print a test label from rollo.com/sample. Then check your print settings:

• Set the paper size to 4 x 6 in the print dialog. Etsy tells sellers to select “4 in. x 6 in.” when printing on label paper and warns that a distorted label may not scan.
• Print at 100 percent (actual size) with fit-to-page scaling off. The driver settings guide covers alignment and offsets.
• Place the label flat on one face of the package. USPS says labels must sit fully on the address side and not fold over package edges, and not to tape over barcodes or the “Postal Use” area.

Store spare stock away from heat and light, since direct thermal coatings darken on exposure. The thermal label storage guide covers this.

Sources

• USPS DMM 204 Barcode Standards : section 2.2.5, narrow bar widths and minimum bar height.
• DYMO LabelWriter 550 / 5XL user guide (PDF) : authentic DYMO labels only.
• Brother DK-1241 (Amazon listing B000KQ1SPA) , DYMO 1744907 labels (Amazon listing B0756M763F) and Rollo 4x6 fanfold labels (Amazon listing B01M9AR01Q) : label sizes and pack counts.
• USPS: Click-N-Ship The Basics : labels should print at approximately 4" x 6"; two labels per 8.5 x 11 sheet option; labels fully on the address side, no tape over barcodes.
• USPS: How do I print a Click-N-Ship label? : “2-Up” prints two 4 x 6½-inch domestic labels on an 8½ x 11 self-adhesive sheet, not for labels with a customs form.
• eBay: Printing and canceling shipping labels : print formats 8 x 11 in, 4 x 6 in, or 2 x 7 in for USPS only; size can only be changed before purchase.
• Etsy: How to Download and Print a Shipping Label : 8.5 x 11 printing, only USPS labels formatted for 4 x 6 printers, select 4 x 6 paper size, distorted labels may not scan.
• Shopify: Printing shipping documents : Thermal 4 x 6 in (100 x 150 mm, A6), Letter 8.5 x 11, A4 formats.
• UPS WorldShip: Set the Label Stock Configuration (PDF) : Thermal 4x6 or 4x6¼ for standard labels, 4x8 for document labels or an extended area.
• Avery 5292 shipping labels : 4 x 6 in, 1 per sheet, laser/inkjet.
• Zebra: Direct thermal vs thermal transfer printing : direct thermal suits short-life labels such as shipping labels; darkens with heat and light.
• Rollo Support: Which labels work with Rollo : direct thermal only, gapped or perforated paper labels, roll placement, calibration and test label.
• Zebra Z-Perform 1000D spec sheet (PDF) : example of separate minimum application temperature and service temperature specs on a shipping label.

FAQ

What size is a standard shipping label?

4 x 6 inches (101.6 × 152.4 mm). It is the label-printer format in Shopify, Etsy and eBay, and USPS says Click-N-Ship labels should print at approximately 4 x 6 inches.

Can I print a 4 x 6 shipping label on a regular printer?

Yes. Choose the letter (8.5 x 11) format and print on plain paper or a full-sheet label. USPS Click-N-Ship can also print two 4 x 6½-inch domestic labels on one 8.5 x 11 self-adhesive sheet, and 4 x 6 laser/inkjet sheet labels such as Avery 5292 exist if your printer feeds that size.

Are all 4 x 6 thermal labels interchangeable?

No. The face size may match, but direct thermal vs thermal transfer, gap or black-mark sensing, core size, roll diameter and fanfold vs roll feed must all suit your printer. Rollo, for example, recommends gapped or perforated paper labels and advises against black-mark stock.

Why does my 4 x 6 label print small, cropped or stretched?

The paper size or scaling is wrong. Set the paper size to 4 x 6 in the print dialog, print at 100 percent with fit-to-page turned off, and on eBay pick the 4 x 6 format before you buy, because eBay only lets you change it before purchase.