VALUE PACK: It comes with 1500 clear envelope seals on an easy-to-dispense roll, enough quantity to meet your different needs. Each measures 1.5" in diameter, proper size for various cards, boxes, packages and envelopes. HIGH DURABILITY: Non-toxic polystyrene stickers with premium adhesive, keep your seal strong for a longer life than other paper stickers. Marking on these labels with an oil-based marker is also no problem. EASY TO USE: It comes in an easy-dispensing roll with perforation line, easy to peel and stick anywhere you want, done! The strong adhesive also makes it stick to most surfaces. Self-adhesive stickers allow you to stick anywhere you want. WIDE APPLICATION: The self-adhesive stickers can stick well on envelopes, folding boxes and most surfaces. Perfect for sealing envelopes, small parcels, retail packaging, brochures, gift boxes, plastic bags and most clean surfaces. LIFE ASSISTANT: It is perfect to help you attach notes where you want, making it much easier to sort