UPC-A (Universal Product Code-A) is fixed length and is the most common UPC barcode for retail product labeling. It is seen in most grocery stores across the United States. The symbology encodes a
12-digit number. The first six digits are assigned from the Uniform Code Council (UCC). The next five digits are assigned by the manufacturer, and the final digit is a modulo 10 check digit. The nominal height for the UPC-A barcode is one inch. The reduced size is 80% of the nominal size.
UPC-A Enable *  | UPC-A Disable  | 
Send Leading Digit *  | Do Not Send  | 
   | Leading Digit  | 
Send Check Digit *  | Do Not Send  | 
   | Check Digit  | 
*Default