You need a unique UPC for every "SKU." If you sell a shirt in 3 sizes and 2 colors, you need 6 unique UPC codes.
Visit gs1us.org. They recently introduced a "Single GS1 US GTIN" for around $30 with no annual renewal fee, making it much more affordable for small startups than it used to be. buy upc codes online
If your primary goal is selling on , be very careful. Amazon’s policy states that they verify UPCs against the GS1 database. If your barcode doesn't match the brand name in the GS1 registry, your listing could be suppressed or removed. For long-term success on Amazon, buying directly from GS1 is highly recommended. 4. How to Complete Your Purchase You need a unique UPC for every "SKU
Never just invent a 12-digit number. It won’t scan, and it will cause massive logistical headaches. If your primary goal is selling on , be very careful