Label size: 4" x 6", 2,000 labels per stack, total 2 stacks = 4,000 labels. Perforated for Easy Tear-off. Our Fan-fold labels are made of superior quality material, designed to provide you with high-resolution prints and fast processing. The face stock has a white surface for good contrast bar codes and text. These blank mailing labels are great for Barcodes, UPS, FedEx, DHL, Amazon, eBay, PayPal Shipping and other vendors. Works with 4" wide thermal printers, like the models: Zebra ZP450, LP2844, LP2844Z, GK420d, GK430t, GX420d, GX430t, GoDex EZ-DT4 and others.