The British sixpence piece, sometimes known as a tanner or sixpenny bit, was a denomination of sterling coinage worth 1⁄40 of one pound or half of one shilling. It was first minted in 1551, during the reign of Edward VI, and circulated until 1980. The coin was made from silver from its introduction in 1551 until 1947, and thereafter in cupronickel.

The standard circulating coinage of the United Kingdom, British Crown Dependencies and British Overseas Territories is denominated in pennies and pounds sterling, and ranges in value from one penny sterling to two pounds. Since decimalisation, on 15 February 1971, the pound has been divided into 100 (new) pence. Before decimalisation, twelve pence made a shilling, and twenty shillings made a pound.