ITF-14 Barcodes Explained: Shipping Cartons, Cases & Logistics

If you’ve ever looked at a cardboard shipping box and noticed a barcode surrounded by thick black lines top and bottom, that’s an ITF-14. It’s the standard barcode for outer shipping cartons, cases, and pallets in the retail supply chain — and it has specific technical requirements that differ from the retail barcodes you’re used to seeing.

This guide covers what ITF-14 is, how it works, its size specifications, and when you need one.

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What Is ITF-14?

ITF-14 is a linear barcode symbology based on Interleaved 2 of 5 (ITF) encoding, standardized by GS1 for use on outer packaging. The “14” refers to the 14-digit GTIN-14 that it encodes.

ITF stands for Interleaved 2 of 5:

• Interleaved: Digits are encoded in pairs — one digit in the bars, one digit in the spaces between them. This makes the encoding very compact.
• 2 of 5: Each digit uses exactly 2 wide elements out of 5 total elements.

The key characteristics of ITF-14:

• Encodes exactly 14 digits (GTIN-14)
• Always has a check digit (position 14)
• Designed for printing directly on corrugated cardboard
• Much larger than retail barcodes — readable by warehouse and distribution center scanners
• Includes mandatory bearer bars (thick horizontal bars above and below)

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What Does ITF-14 Encode?

ITF-14 encodes a GTIN-14 (14-digit Global Trade Item Number), which identifies a specific trade item at a specific packaging level.

A GTIN-14 for a case of 12 products looks like:

[Indicator digit][GS1 Company Prefix][Item Reference][Check Digit]

Example:

• Indicator digit: 1 (indicates case/inner pack — 0 = same as consumer unit)
• Company Prefix: 0614141
• Item Reference: 0001
• Check Digit: 5 (automatically calculated)

Full GTIN-14: 10614141000159

Indicator Digits

The first digit of a GTIN-14 is the packaging indicator:

• 0: Same item as consumer unit (GTIN-13 extended to 14 digits with leading zero)
• 1–8: Inner packs, cases, and outer packaging levels
• 9: Variable measure trade items

Most retailers use indicator digit 1 for their standard case configuration.

Converting a Product GTIN to a Case GTIN

If your product has a GTIN-13 of 5012345678900, the ITF-14 for a case of that product would be:

• Strip the existing check digit
• Add the indicator digit at the front
• Recalculate the check digit

This calculation is handled automatically by barcode generators that support GTIN-14 with check digit verification.

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ITF-14 vs EAN-13 / UPC-A

Feature	ITF-14	EAN-13 / UPC-A
Used on	Outer cases, cartons	Individual consumer products
Scanned at	Warehouse, distribution	Retail POS
Size (nominal)	142.75mm × 32mm	37.29mm × 25.93mm
Digits	14	13 / 12
Bearer bars	Required	Not present
Substrate	Corrugated cardboard	Label stock
Printing method	Direct print or label	Label

The size difference is significant. ITF-14 is nearly 4× wider than EAN-13 at nominal size — it’s designed to be read by fast-moving conveyor belt scanners from larger distances, not handheld retail scanners.

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Bearer Bars: What They Are and Why They’re Required

Bearer bars are the thick horizontal bars running completely across the top and bottom of an ITF-14 barcode (and often vertical bars on the sides too). They are mandatory for ITF-14.

Why Bearer Bars Exist

ITF-14 is printed directly on corrugated cardboard, which is a rough, uneven substrate. Without bearer bars:

• The scanner beam can hit the edge of the barcode at an angle
• A partial scan reads only some bars, returning corrupt data
• The scanner may accept a partial read that returns an incorrect code

Bearer bars act as limits that prevent partial reads. When a scanner detects bars outside the bearer bar boundaries, it knows the read is incomplete and ignores it.

Bearer Bar Dimensions

Per GS1 specifications:

• Bearer bar width = 4.8× the X-dimension (narrowest bar width)
• At nominal size (X = 1.016mm): bearer bar = 4.88mm thick
• Bearer bars extend the full width of the symbol plus the quiet zone

Bearer Bar Variations

The standard ITF-14 has full bearer bars (continuous top and bottom bars plus two vertical side bars forming a complete rectangle). Some applications use top-and-bottom bars only, but the full rectangle is standard and required for most retail/logistics applications.

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GS1 Size Specifications

Nominal (100%) Dimensions

• Width: 142.75mm (approximately 5.62 inches)
• Height: 32.00mm (approximately 1.26 inches) — this is the height of the bars only, not including bearer bars
• X-dimension: 1.016mm

The X-dimension for ITF-14 is about 3× larger than for EAN-13, which is why the barcode is so much physically larger even though it encodes only one more digit.

Magnification Range

Magnification	Width	Height
62.5% (minimum)	89.22mm	20.00mm
100% (nominal)	142.75mm	32.00mm
125% (maximum)	178.44mm	40.00mm

Note: The minimum is 62.5%, not 80% as for retail barcodes. Corrugated cardboard printing is less precise, so GS1 allows a wider magnification range.

Quiet Zone Requirements

• Minimum 10× X-dimension on both left and right sides
• At nominal size: minimum 10.16mm quiet zone on each side
• Top and bottom: bearer bars serve as the quiet zone delimiter

Total Symbol Width Including Quiet Zones

At nominal size: 142.75mm + (2 × 10.16mm) = 163.07mm (approximately 6.4 inches)

This means you need a clear area of at least 163mm wide on the carton for a standard ITF-14.

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Printing ITF-14 on Corrugated Cardboard

The Corrugated Cardboard Challenge

Printing on corrugated cardboard is fundamentally different from printing on flat label stock:

• The surface is textured and slightly uneven
• Ink spread (dot gain) is higher — bars print slightly wider than specified
• Print registration accuracy is lower

GS1 accounts for this by specifying a larger X-dimension and allowing wider magnification tolerance.

Two Printing Approaches

Pre-printed corrugated (flexographic printing) The barcode is printed directly on the box blank before assembly, using flexographic printing presses. This produces consistent results at high volume but requires printing plates.

Most corrugated box manufacturers can print ITF-14 directly. Provide them with:

• Your GTIN-14 number
• The barcode as an SVG or EPS file at the correct magnification

Label application For smaller quantities or when adding barcodes to existing stock, print ITF-14 on a label (thermal transfer or laser-printed) and apply to the carton. The label must be flat on the carton surface — no wrinkles or air bubbles.

Ink Color Requirements

• Bars: Black (preferred) or very dark colors
• Background: White or natural corrugated (light brown)
• Critical: The natural brown of corrugated cardboard has sufficient reflectance for ITF-14 scanning. You don’t need to print a white background, but the contrast must be sufficient.
• Avoid printing on dark-colored cartons without a white background patch

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When Do You Need an ITF-14?

You need an ITF-14 barcode if:

• Shipping products in cases to retail distribution centers
• Your retailer (Walmart, Target, Amazon, etc.) requires carton-level barcodes on inbound shipments
• Working with 3PL (third-party logistics) providers who scan cases
• Receiving or shipping via GS1-compliant EDI systems

You don’t need an ITF-14 if:

• Selling individual units only (the consumer product barcode is sufficient)
• Shipping direct-to-consumer without retail distribution
• Products are not distributed through supply chains that scan outer cartons

Check your retailer’s routing guide or supplier manual — major retailers specify exactly what they require, and penalties for non-compliance (chargebacks) can be significant.

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Generating ITF-14 Barcodes

To generate an ITF-14:

1. Determine your 13-digit GTIN-13 base (your product’s EAN-13 without the check digit position)
2. Choose an indicator digit (typically 1 for a standard case)
3. Concatenate: [indicator][GS1 prefix][item reference][13-digit GTIN without check]
4. Calculate the check digit (the generator handles this automatically)

Use our barcode generator and select “ITF-14” as the barcode type. Enter your 13-digit GTIN-13 (without the check digit) along with your indicator digit. The check digit for the full GTIN-14 will be calculated automatically.

Download as SVG and provide to your carton printer at the appropriate magnification per GS1 specifications. Always request a print test before approving a full production run — have the test scanned at the distribution center or with a GS1-compliant scanner.

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Summary

ITF-14 Specification	Value
Digits encoded	14 (GTIN-14)
Nominal width	142.75mm
Nominal height	32.00mm
Minimum magnification	62.5%
Maximum magnification	125%
X-dimension (100%)	1.016mm
Quiet zone	10× X-dimension per side
Bearer bars	Mandatory
Standard substrate	Corrugated cardboard
Minimum contrast	GS1 reflectance requirements

ITF-14 is the link between consumer product identification and supply chain logistics. If your business distributes through retail channels, understanding and correctly implementing ITF-14 is essential for smooth operations and avoiding retailer chargebacks.