The plate highlights 3.5" on the plate and 3.5" off the plate. Provides a great visual for pitchers to see the corners and just off of the plate, while acting as a positioning tool for catchers. Keeps catchers centered over the two white points, which represent the edge of a regular plate (17" white point to white point). May also be used in hitting drills (two-strike hitting, expanding the zone). Made of lightweight yet very durable ABS-weighs just under 1.6 lbs. .