A new device ancillary to the game of bocce that enables the user to compare the distances between the target ball and two or more player balls for the proper awarding of game points or determining player throwing order. The device consists of a lower housing upon which an upper housing, containing a tape assembly, is rotatably mounted. In operation, the lower housing is placed over the target ball. Next, a tape is extended from the upper housing to make contact with one of the player balls. Then, the tape is locked at the extended position and the upper housing is rotated toward the second player ball. Finally, the comparison of the players' balls distances from the target ball is accomplished by observing whether the extended tape makes contact with the second player ball.