Pattern making includes Dart manipulation, Different types of collars, Sleeves, Cowls & Fullness. The purpose of a pattern is simple. When creating several of the same type of garment, the pieces used to make the clothing should be uniform size and shape from one garment to the next in order to prevent unusually shaped or sized garments. Tracing around or cutting around pattern pieces for each of the different sections of a garment helps ensure this uniformity.