"These labels can be used for address labels, color coding, product identification, file folders, barcoding and much more. 1-1/8"" x 3-1/2"" 350 Labels Per Roll Labels are bright PURPLE for professional results Labels are smudge-proof as well as water and oil resistant BPA Free Print labels using software programs like Microsoft Word®, Microsoft Outlook®, Act!® and QuickBooks® (sold separately) Compatible Printers: Dymo Printers: 300, 310, 315, 320, 330, 400, 400 Duo, 400 Twin Turbo, 450, 450 Duo, 450 Turbo, 450 Twin Turbo, 4XL, EL40, EL60, SE300, SE450 CoStar LabelWriters: XL, XL+, BC, BC+, TURBO, SE200, SE250, ACII 200 / ASCII 250"