How to Get a UPC Barcode for Your Product

Somewhere between “great product idea” and “on the shelf at a major retailer” sits a small, striped rectangle that has the power to stop your whole launch cold. Get the barcode right and nobody ever thinks about it again. Get it wrong and your shipment gets rejected at the receiving dock. Here’s how to get it right the first time.

What Is a UPC Barcode?

UPC stands for Universal Product Code. The standard retail format is UPC-A: a 12-digit barcode that encodes a unique identifier for your product. When a cashier scans it at the register, that number is looked up in the retailer’s database, which pulls the product name, price, and inventory record. The stripes don’t hold the price — they hold the key that finds it.

Here’s the part people underestimate: every unique product-SKU combination needs its own UPC. A 12 oz coffee bag and a 16 oz bag of the exact same blend are two different SKUs, so they need two different UPCs. Different colors, sizes, and variants each get their own code, no exceptions.

Step 1: Buy a GS1 Company Prefix

The only legitimate source for retail-compliant UPC barcodes in the United States is GS1 US (gs1us.org). GS1 is the global standards organization that manages product identification, and retailers verify barcode ownership through GS1’s database. This is the step you can’t shortcut.

You purchase a GS1 Company Prefix: a 6- to 10-digit number assigned to your company. The length of the prefix determines how many GTINs (product codes) you can create — a shorter prefix leaves room for more products and costs more:

For most small to mid-size brands, a 9- or 10-digit prefix covers everything you need. If you’ve got a handful of products, a 10-digit prefix is the right place to start — you can always expand later.

Step 2: Assign GTINs to Your Products

Once you have your Company Prefix, you build a GTIN-12 (Global Trade Item Number) for each product by combining three pieces:

1. Your Company Prefix — the number GS1 assigned to you.
2. An Item Reference Number — a unique number you assign to each individual product.
3. A single check digit — calculated from the preceding digits using a standard algorithm. GS1’s website has a free check digit calculator, so you don’t have to do the math by hand.

The result is a 12-digit number that identifies your product globally. Then register each GTIN in GS1’s database through their GS1 Registry — this is the record retailers actually look up. An unregistered GTIN is a number that matches nothing in their system.

Step 3: Get Your Barcodes Printed on Labels

A GTIN is just a number until it’s printed as a scannable barcode on your product. This is where most brands trip — not on the GS1 side, but on the print side. Here’s what a clean print job needs:

• The 12-digit GTIN — the number itself.
• A print-ready barcode in UPC-A symbology, generated as a vector file (not a screenshot or raster image).
• Correct size: UPC-A prints at a minimum of 1.02" × 0.74" at 100% magnification.
• A label printer who can verify the printed result against ANSI/ISO quality standards.

Barcode quality isn’t cosmetic. A code that looks perfectly fine to your eye can still fail to scan reliably at retail if the ink spread, bar width, or quiet zone drifts out of tolerance. And a barcode that won’t scan at the register is a barcode that gets your product benched.

At Certified Labeling Solutions, we verify barcode print quality on every label order using ANSI/ISO grading. Most major retailers require a minimum grade of C or better — we target A and B grades as standard practice, because “it usually scans” isn’t a spec anyone wants to explain to a buyer.

UPC-A vs. EAN-13: Which Do You Need?

Quick gut check before we lay it out:

UPC-A is the standard for retail in the US and Canada — a 12-digit barcode. EAN-13 is the international equivalent, a 13-digit code used across Europe, Asia, and most global markets. EAN-13 is backward-compatible with UPC-A, so any scanner that reads one reads the other. Selling only in the US and Canada? UPC-A is all you need. Going global? Your GS1 Company Prefix can generate both from the same GTINs.

Common Mistakes to Avoid

The mistakes here are predictable, which is the good news — predictable means avoidable. Tap any one for the fix.

What Comes After the Barcode

The UPC gets your product scanned at the register, but retailers usually want more once you’re in the door. As your product moves through the supply chain, each layer gets its own barcode:

• Shipping cartons — a GS1-128 barcode identifying the contents and quantity.
• Pallets — SSCC (Serial Shipping Container Code) labels for high-volume shipments into distribution centers.
• Amazon FBA — an FNSKU barcode for products fulfilled through Amazon’s warehouse network.

Each is a different format with its own spec. We produce all of them, so you’re not chasing a separate vendor every time a retailer adds a requirement.

Getting a UPC really is two jobs: buy your GS1 Company Prefix, then get the barcode printed correctly on your labels. The GS1 side is paperwork. The print side is where launches actually stall — wrong size, unverified quality, or artwork that breaks the quiet zone. We’ve been printing retail-compliant, ANSI/ISO-verified barcode labels for manufacturers and brands across NJ, NY, and PA — and nationwide — since 1986.

Got your GS1 numbers and need them on print-ready labels? Call (908) 495-6235 or request a quote, and we’ll make sure your barcodes scan clean the first time.