These labels will suit a Dymo Labelwriter 300, Labelwriter 400, Labelwriter 4XL and Labelwriter 450 series printers. This label type is considered a white lever arch file label or sticker and allows the printer to print black on white only on an adhesive paper label or paper sticker. It's measurements are 59 x 190mm (2 1/3" x 7 1/2") and they come in a box of 1 roll of 110 labels.