Distance from the back corner of home plate to centre of second base or the far corner of first base to the far corner of third base.
90ft base path = 127.28′ or 38.79m
60ft base path = 84′ 10 1/4″ or 25.863m
55ft base path = 77′ 9 3/8″ or 23.707m
45ft base path = 63′ 7 5/8″ or 19.397m