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
Fine Media
Roll paper
30 to 112 mm
25.4 to 108 mm
25.4 to 1117.6 mm
When it is less than 15 {0.59"} to 25.4 {1"} mm, use the label of
"When removing right and left fringes only" in the illustration.
3 to 6 mm
2 ± 0.5 mm
2 mm or less
0.145 mm
Outside diameter: 56.8 mm
Maximum 101.6 mm
Printing face must be facing outside.