For use with most Dymo label printers: LabelWriter 4XL, LabelWriter 450, LabelWriter Wireless, LabelWriter 450 Duo, LabelWriter 450 Turbo, LabelWriter 450 Twin Turbo, and Desktop Mailing Solution. For mailing, shipping, or labelling. Uses a direct thermal printing process. Packaged in rolls, so you can print one label or hundreds with ease. Peel-and-stick multipurpose labels with strong self-adhesive backing. 2-1/8 x 4 in. Includes 220 labels per one roll.