Epson C3500 Technical Reference Guide - Page 230

When "Borderless Printing" is enabled Top, bottom, left. right margins: 0 mm (Typical value) Paper width 36 mm Paper feeding direction Center of paper width 7.9 mm 5.5 mm Autocutting position 157.2 mm 70.4 mm 81.5 mm 184.2 mm 230 30.2 mm 72.5 mm 11.0 mm Recommended print area for text and barcodes (*dimension) 14.6 mm 105.9 mm 12.4 mm 15.0 mm Autocutting position Print area Paper Blackmark position (back)  Do not print inside or within 2 mm {0.08"} around the snap button mounting hole to prevent damage to the mechanical functions.  If using the WB-S/M/L series, use the attachment (OT-WA34).  If you enabled "Borderless Printing", printing is done with settings for no margins, but the printing might protrude beyond the paper/label, depending on the actual print position and the set position for the paper/label. To make sure printing does not protrude out, ensure margins of 1.5 mm {0.06"} or more in the print data.