A glass panel for a cathode ray tube comprises a substantially rectangular
face portion on which images are displayed and a skirt portion continuous
to the face portion through a blend R portion. An effective screen size of
the face portion in a diagonal direction is 500 mm or more, an average
radius of curvature of an outer surface of the face portion is 10000 mm or
more in all radial directions from a face center portion, and a difference
in height between the face center portion and an edge portion of the
effective screen in the diagonal direction on an inner surface of the face
portion is in a range from 9 mm to 17 mm.
