Universal Shipping Labels: 4"x6" (104 mm x 159 mm), 500 labels per stack; For thermal printers only, not for laser or inkjet printers Water and Oil Resistant: Made of durable paper material, scratch-proof, waterproof, dirt-proof, dust-proof, oil-proof, always keep the information clear and easy to read Ultra-Strong Adhesive: Tear-and-stick labels with a premium strong adhesive on the back, allowing each label to adhere to any packaging surface for a long time; No need to worry about loss of labels due to transportation Reliable Quality: Designed for thermal printers, these labels produce clear, sharp images and barcodes that are easy to scan. They’re highly resistant to smudges and scratches, maintaining their legibility throughout shipping and handling Widely Uses: Perfect for a wide variety of applications, including shipping labels, address labels, FBA labels, nutrition labels, and mailing labels. These labels are commonly used for USPS, UPS, FedEx, DHL, Amazon, and eBay shipments 4 x 6 inch Direct Thermal Labels White Perforated Shipping Labels,500 Labels per Stack,1 Stack