Avery Weatherproof Laser Shipping Labels, 2" x 4", 500/Pack (5523) Great for shipping Christmas gifts, holiday orders and care packages; sturdy labels will ensure your labels won't fall off in transit Durable polyester labels provide strong protection against harsh elements TrueBlock technology completely covers everything underneath, so you can reuse boxes, mailing tubes, envelopes and more Customize with free templates and designs at avery.com/print Optimized with laser printers