These direct thermal labels measure 40mm x 30mm and are for use in a wide range of scales. They are thermal and come on a roll of 2500 labels. Thermal transfer labels can be used for many applications including shipping, barcoding, inventory tracking and more. They are more resistant to sunlight and other harsh elements. The labels are waterproof, and strong adhesive. They can stick well to corrugated boxes, stretch film wrap, poly bags and all types of packaging and shipping products. These white paper labels are also multipurpose labels, name tag badges labels, product description label and barcode labels, can be used for envelope, mail, letters,and parcel, temporary and indoor signage. packaging and other retail uses.