Epson EPL-N7000 Reference Manual page 461

Print sample
EPSON EAN-13
EPSON UPC-A
UPC-A is the standard bar code specified by the American
Universal Product Code (UPC Symbol Specification Manual).
Only regular UPC codes are supported. Supplementary codes
are not supported.
Character type
Number of characters
Font size
The following codes are inserted automatically and need not be
input by hand:
Left/Right margin
Left/Right guard bar
Center bar
Check digit
OCR-B
450
Working with Fonts
Numbers (0 to 9)
11 characters
60 pt to 150 pt (up to 96 pt in
Windows XP/2000/NT). Recommended sizes
are 60 pt, 75 pt (standard), 112.5 pt and 150 pt.