: having the same foot-to-face height as printing type and being 0.9186 inch in English-speaking countries plates must be mounted type-high.

How high is type high?

adjective Printing. of a height equal to the distance from the foot to the face of a type: 0.918 inch (23.3 millimeters).

What does type height mean?

The height, called type height, is the distance from the face that touches the paper to the feet. ... A width with a special name is the em, the width of a square piece of type, one whose face is as wide as it is long.