
1 line = 1 pica = 0.1656"
1 pica = 12 points
1 point = .0138"
1 point didot = 0.014" = 0.376mm
1 cicero = 0.168" = 4.512mm
The type-height was quite different in different countries, the Monotype Corporation Limited in London UK produced moulds in various heights:
0.918 inches : United Kingdom, Canada, USA
0.928 inches = 23.57mm: France, Germany, Swiss and most other European Countries
0.933 inches : Belgium height
0.9785 inches : Dutch height