Epson ColorWorks C3400-LT Technical Reference Guide - Page 197

Appendix Paper type Form Backing paper width Label width Label length Gap between labels Edge cutoff on left/right side Label edge R Paper thickness Roll paper core External diameter Winding direction Synthetic Media Label Roll paper 30 to 112 mm 25.4 to 108 mm With the roll paper core of 44.1 mm or more: 50.8 to 1117.6 mm With the roll paper core of 56.8 mm or more: 32 to 1117.6 mm (To use a label with a label length of less than the abovementioned, see descriptions for Black Mark Die-cut Label.) 3 to 6 mm 2  0.5 mm 2 mm or less 0.195 mm Outside diameter: 44.1 mm Maximum 101.6 mm Printing face must be facing outside. Do not use the paper with a hole or cutout. 197