Epson TM-C3400 Technical Reference Manual page 36

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
Do not use the paper with a hole or cutout.
36
Synthetic Media Label
Roll paper
30 to 112 mm
25.4 to 108 mm
50.8 to 1117.6 mm
When it is less than 15 {0.59"} to 50.8 {2"} mm, use the label of
"When removing right and left fringes only" in the illustration.
3 to 5 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.