Epson ColorWorks C3500 Technical Reference Guide - Page 214

Wristband Center of paper width Center of black marks Center of paper width Paper feeding direction Black mark length Interval of black marks Black mark width Black mark paper Media type Media source Paper width Black mark width Black mark length Center of a black mark Gaps between black marks Paper thickness Paper core External diameter Winding direction Hole, notch WB-S/M/L series (Synthetic media) Roll paper WB-S/M/L series: 36 mm {1.42"} 13 mm {0.51"} or wider 4 mm {0.16"} or more (with a width of at least 4 mm around) 8.5 mm  1 mm {0.33  0.039"} WB-S: 184.1 mm {7.25"} WB-M: 292.1 mm {11.5"} WB-L: 292.1 mm {11.5"} WB-S/M/L series: 0.225 mm {0.0088"} External diameter 56.8 mm or more Maximum 101.6 mm {4"} Printing face must be facing outside. Diameter: 2.5 mm or less 214