Epson AcuLaser C4000 Owner's Manual page 396

Character type
Number of characters
Font size
The following codes are inserted automatically and need not be
input by hand:
Left/Right quiet zone
Start/Stop character (when not input)
Check digit
386
Working with Fonts
Numbers (0 to 9)
Symbols (- $ : / . +)
No limit
When OCR-B is not used: 26 pt or more (up
to 96 pt in Windows XP, 2000 or NT).
Recommended sizes are 26 pt, 52 pt, 78 pt
and 104 pt.
When OCR-B is used: 36 pt or more (up to
96 pt in Windows XP, 2000 or NT).
Recommended sizes are 36 pt, 72 pt, 108
pt and 144 pt.