A paper clip is a simple device that is used to hold sheets of paper together by securing the top sheet to the bottom sheet in a looped configuration. Paper clips are made of a thin, flexible wire, typically made of steel or another metal, and are commonly used in offices, schools, and other environments where paper documents are frequently handled.
Paper clips are available in a range of sizes and shapes, depending on the thickness and type of paper being secured and the desired level of visibility. Some common sizes of paper clips include standard, jumbo, and mini. Some paper clips are also coated with a thin layer of plastic or another material to provide additional grip or to prevent the clip from leaving marks on the paper.
In addition to their practical use, paper clips have become a symbol of resistance and hope, particularly in the context of the Holocaust, where prisoners in concentration camps used them to secretly hold together documents and other materials. The paper clip has also been used as a metaphor for the concept of linking ideas or information together.