The Margon font family consists of 18 members divided into 4 groups of different proportions marked by indexes 360, 380, 400, 430. These values correspond to densities of sets -- 360 is the widest style, 430 is the most narrow one. The peculiarity of Margon family is a rather small difference in proportions of characters between neighbor groups, it’s less than 10%. Such tiny step gives possibility to select the font that gives the best result in combination of capacity and readability.