In many games there is a definite scale specified for the square grid that the game is played upon. One of the most common is 1 inch represents 5 feet. This specifies an exact scale of 1:60. That implies that a 28 mm tall figurine represents a 1.68 m (5 ft 6 in) person – which is a reasonable number for a modern 50th percentile male (See: Human height). Another popular scale is 1/72 or 1 inch equals 6 foot which uses 20 mm, to 25 mm miniatures. It is mostly used for historical gaming in part due to a wide selection of 1/72 scale models.