pdc® Blank Label Thermal Label White Paper 1-1/2 X 3-1/2 Inch (1147755_CS) 8/CS1 1 2 x 3 1 2 white labels fit thermal label printers using 1 inch cores and accepting 4 inch outer diameter rolls. Corners of labels have a ? inch radius. There are perforations between labels and a ? inch gap between labels. There are 760 labels on a roll: Core of roll is 1 inch. Labels have a glove friendly adhesive.