Topic summary
En quad
Extracted from the Wikipedia article Quad (typography).
In typography, a quad (originally quadrat) was a metal spacer used in letterpresstypesetting. The term was later adopted as the generic name for two common sizes of spaces in typography, regardless of the form of typesetting used. An em quad (originally m quadrat) is a space that is one em wide; as wide as the height of the font. An en quad (originally n quadrat) is a space that is one en wide: half the width of an em quad.