Epson LX-300+II User Manual page 154

B The minimum left and right margins are 13 mm (0.51 inch)
each.
The maximum paper width is 254 mm (10.0 inches).
The maximum printable width is 203.2 mm (8.0 inches). If the
paper size is substantially wider than this, the side margins
will be wider than the minimum, but the printable width
does not increase beyond 203.2 mm (8.0 inches).
For LX-1170II
A The minimum top and bottom margins above and below the
perforation are 4.2 mm (0.17 inch) each.
B The minimum left and right margins are 13 mm (0.51 inch)
each.
The maximum paper width is 406.4 mm (16.0 inches).
The maximum printable width is 345.44 mm (13.6 inches). If
the paper size is substantially wider than this, the side
margins will be wider than the minimum, but the printable
width does not increase beyond 345.44 mm (13.6 inches).
Roll paper:
154