Most listings describe them as paper-based—terms used include paper, label stock paper, or sticker paper.
Many are scratch-and-sniff: you scratch the sticker surface to release the scent.
Common uses include rewards and encouragement, grading or classroom activities, party favors and candy labeling, arts and crafts, incentive charts, and adding to invitations or cards.
Age recommendations vary by listing; examples include '4 years and up', '5 years and up', and '12 years and up'.
Some listings specify paper-quality features such as acid-free and lignin-free sticker paper.
Round, candy-style stickers are common; some packs include multiple coordinating designs (examples: packs with 4 different designs or packs listing 10 designs).