The KayFig pattern line was created for the living history and reenactor market. These patterns are designed to fit the modern figure while creating the period look and proportions. These patterns are based on extant garments and original patterns and emphasize commonalities rather than idiosyncrasies of one specific garment.
Instead of one base size which is then mathematically graded for the other sizes, each size has its own block derived from actual people. This approach to creating a pattern is similar in the manner of how patterns were developed in the 19th century.