Koch marketed Kabel with a specimen showing the capitals supposedly derived from a construction grid of perfect rectangles and circles, but Walter Tracy and others have noted that this graphic does not really resemble the letters of the printed type, which were clearly drawn freely rather than by uncorrected geometry: "Koch probably drew letters without constraint, and then 'rationalised' them afterwards…Koch was evidently not a man to be bound by arbitrary rules. In Kabel Light the arms of E are actually three different lengths, the bowl of R is deeper than that of B, and in P it is deeper still…and Y does not have the vertical stem shown in the diagram. In short, Koch's sense of style is in command, rather than any geometric formula. The result is an alphabet of capitals that relate perfectly without need [of 'mathematical harmony'…they are, for my taste, the most attractive of all sans-serif capitals."