The direct thermal label sticker size: 2 inch,500 pcs on a roll.The thermal printer labels are suitable for envelope seal, color coding for inventory.Colorful adhesive labels are made of matte paper,with strong adhesive,easy to peel and apply,can be pasted on most smooth surfaces-roll,easy to carry.Easy to use: Thermal printer printing use, handwritable. No Ink Toner or Ribbons Needed! Round color coding stickers are strong self-adhesive,easy to peel and stick.These colorful circle stickers are also used for moving,envelope sealing,storage,organization, color coding,art,education,sorting, scrapbooking,crafts,school functions,teachers, offices,warehouses,food service,medical, cosmetic canned label stickers and more