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An adhesive label or sticky label is a small piece of paper designed to be affixed to any surface, typically by exposing a layer of adhesive on the front or back of the label. The term adhesive refers to a sticky substance, while something that is self-adhesive implies that it will stick without wetting or the addition of glue to the product.
One of the most familiar types of adhesive labels is the postage stamp, which was developed in Britain in the 1840s and became popular in the United States within the same decade.
In 1935, R. Stanton Avery invented a machine to manufacture self-adhesive labels. Over time, Avery's invention influenced the ways that manufacturers and brands advertised information on their products. Avery used a die-cutting process, allowing the paper to be cut into a repeated, specific shape, usually a rectangle or a square. In the 1960s, further innovations, increasing demand, and new kinds of adhesives were produced, and self-adhesive labels began to be manufactured on a large scale to a worldwide market.thumb|right|A sheet containing adhesive labels
There are three main classifications for label adhesives: permanent, removable, and repositionable. Each variation has its own unique qualities and uses. The bond strength of each type of adhesive ranges from a strong bond which is permanent, to a flexible bond, which can be repositioned or removed entirely. Adhesive labels may now be produced individually, or in sheets, which case they are usually separated by perforations or rouletting, see postage stamp separation. Digital printing technology is also being used to improve this process. This innovative printing allows for customizable, print-on-demand products and has the capacity to lower costs for manufacturers worldwide. A recent article suggests that an increased consumer awareness paired with developments in technology will result in a strong future for adhesive labels.