The cabinet door overlay is the distance that the cabinet door extends past the door opening in all four directions in order to cover it. However, this distance may not be exactly equal on all four sides. So in order to accurately measure the overlay, follow the steps below:
Close the cabinet door.
Use a pencil to make a light mark on the cabinet frame using the edge of the door as your guide. Make sure you do this on the hinge side of the door.
Open the door and measure from that mark over to the edge of the face frame.
This measurement is normally in the range of 1/4″ to 1-1/2″.