A marble is a small spherical object often made from glass, clay, steel, plastic, or agate. These toys can be used for a variety of games called marbles, as well being placed in marble runs or races, or created as a form of art. They are often collected, both for nostalgia and for their aesthetic colors.
Sizes may vary, but usually range from about 0.5 to 3.5 cm (0.2 to 1.4 in) in diameter.
In the north of England the game and objects are called "taws", with larger taws being called "bottle washers", named after the use of a marble in Codd-neck bottles, which were often collected for play.