Fit & patternmaking

The curved seam line of a trouser pattern that shapes the crotch area between the front and back leg pieces, critical to comfort and the elimination of crotch wrinkles.

The process of constructing a trouser pattern from waist, hip, crotch, and leg measurements, shaping the crotch curve, inseam, and outseam of the front and back leg pieces.

The pattern pieces and construction lines for a trouser's front closure, including the fly extension, fly shield, and zipper placement, added to the basic trouser front.