If the length of the peg is equal to the length of the square's side then it is a cube. If the length of the peg is equal to or less than the length of the square's side but greater than about half the length of the square's side then it is a block. If the length of the peg is much less than the length of the square's side and the length of the square's side is greater than the diameter of a can or bottle of beer then it is a coaster.
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