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Fabric pulling tight and creasing across the crotch of trousers usually comes from a crotch curve too shallow or a rise too short for the wearer. Lower the curve or lengthen the rise in a future muslin.

A manual grading method in which a pattern is sliced along designated lines and spread apart or overlapped by fixed increments to create a larger or smaller size.

An industrial machine with a narrow, tube-shaped bed that allows sewing on cuffs, cylindrical items, and other hard-to-reach curved seams.

The technique of moving a dart from one location on a pattern to another while keeping the garment's overall fit and shape unchanged.

A serger or coverstitch feature using two independently adjustable feed dogs, front and back, to stretch or gather fabric as it feeds, preventing waves or puckering.

Software used to convert artwork or images into a stitch-by-stitch embroidery file, defining stitch type, direction, density, and sequence.

A striped or patterned fabric that doesn't line up across a seam comes from cutting pieces without matching the pattern repeat. Plan the layout so repeats align at key seams, buying extra fabric to allow it.

Diagonal wrinkles radiating from the bust point signal the dart isn't positioned or sized correctly for the wearer's shape. Adjust the dart point toward the fullest part of the bust and check its depth.

A dart whose shape and placement are determined by pinning fabric directly on a dress form rather than by drafting formulas, allowing organic, sculptural shaping.

A patternmaking method in which fabric is pinned and shaped directly on a dress form or body to develop a pattern, as an alternative to flat drafting from measurements.

Software used to browse, resize, combine, and edit purchased or created embroidery designs before sending them to an embroidery machine.

A proprietary or standardized file type, such as .pes or .dst, that encodes stitch placement and machine commands for a specific embroidery design.

A tailoring style developed on Savile Row in the 1920s-30s that adds fullness across the chest and back for ease of movement while maintaining a structured silhouette.

A decorative technique that joins two finished edges with an open, ladder-like pattern of stitches across a visible gap, rather than a closed seam.

A hooped or padded understructure worn beneath skirts from the 15th to early 17th centuries to create a rigid conical or wheel-shaped silhouette, first developed in Spain.

A small, slanted hand stitch used to permanently secure a folded edge flat against another layer, such as a facing or waistband lining, common in couture finishing.

A person with standardized body measurements who tries on sample garments during development so a design house can check and refine the fit.

A serger stitch sewn with loose tension so the seam pulls flat and open, leaving a ladder of thread on one side, often used decoratively on knits.

Corduroy or velvet that looks crushed after ironing comes from pressing directly on the pile with a flat iron sole. Press face-down on a towel or use a needle board so the pile can stand.

A zipper closure concealed behind an extended, shaped fly facing and underlap, typical of trousers and jeans.

A pattern alteration that reshapes the lower portion of a sleeve to accommodate a forearm that is bent, muscular, or otherwise shaped differently from the standard block.

A pattern alteration that rotates the shoulder seam of a bodice pattern forward to match shoulders that sit ahead of the torso's standard balance line.

An overlock stitch using two needle threads and two looper threads to form a durable seam that both sews and finishes an edge in one pass.

Decorative stitching created by manually guiding fabric under a lowered or disengaged feed dog, allowing the stitcher to draw with thread in any direction.

A doubled-back shirt cuff, folded over and fastened with cufflinks rather than a button, giving a dressier finish.

A short thread chain, several strands long, connecting a lining to a garment at the hem, allowing movement without the layers separating.

A decorative fastening of intricately knotted cord or braid, with a button-like knot and a loop, traditionally used on Chinese-style and Asian-inspired garments.

A suit-jacket construction in which a floating canvas interlining is sewn, not glued, throughout the front, allowing the jacket to mold to the wearer's body over time.

A sheer, lightweight crepe-weave fabric with a dull, crinkled surface from tightly twisted alternating S and Z yarns, similar to chiffon but with more texture.

In industry usage, the process of mathematically scaling a base pattern up and down to create a full, consistent range of sizes for production.

Blending two adjacent pattern sizes, such as a smaller bust with a larger waist, is done by tracing each size's line at the relevant area and drawing a smooth curve connecting them across the piece.

A small diamond or triangular piece of fabric inserted at the underarm or crotch seam to add ease of movement and reduce stress on the seam.

Historically, a dealer in small sewing goods and trimmings in Britain, or a dealer in men's clothing and furnishings in the United States.

A woven interfacing of hair, wool, and cotton fibers, hand or machine stitched into a jacket's chest and lapel to build structured, moldable shape in traditional tailoring.

An extremely narrow seam trimmed close to the stitching line after sewing, used on sheer fabrics such as chiffon or lace to minimize visible bulk.

A hem invisibly secured by hand stitching rather than machine stitching, standard in couture and fine tailoring for its near-invisible finish.

A zipper inserted using small, evenly spaced hand backstitches or prick stitches along the zipper tape instead of machine topstitching, for an inconspicuous couture finish.

A very narrow hem formed by rolling the raw edge between the fingers and securing it with tiny whipstitches, used on scarves, ruffles, and fine fabrics.

Costume-making practice that researches original garments, patterns, and construction methods from a specific historical period to recreate them as accurately as materials allow.

A narrow ankle-length skirt so tight at the hem that it restricted the wearer's stride, a controversial fashion of the early 1910s associated with designer Paul Poiret.