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Skipped stitches
Stitches that fail to form, leaving gaps, usually come from a bent, dull, or wrong-type needle, or bad threading. Replace the needle, match it to the fabric, and rethread top and bobbin.
beginner · Machine problems
Slip
An undergarment worn beneath a dress or skirt to smooth the silhouette and prevent fabric cling, typically cut from lightweight, often bias-cut fabric.
beginner · Lingerie & swimwear
Snap crotch closure
Row of snap fasteners along the inseam or crotch of an infant garment allowing it to be opened flat for easy nappy changes.
beginner · Children & menswear
Snap fastener
A two-part mechanical fastener with interlocking ball-and-socket discs that click together, used for quick, low-profile closures on garments and accessories.
beginner · Fastenings & hardware
Snap tape
Twill tape pre-fitted with evenly spaced snap fasteners, stitched to a garment opening in one pass, commonly used on baby clothing for quick closures.
beginner · Fastenings & hardware
Snapped bobbin thread
The bobbin thread breaking mid-seam, leaving only top stitches, often means the bobbin was wound unevenly, inserted backward, or lint has jammed the case. Rewind the bobbin evenly, reinsert correctly, and clean the case.
beginner · Stitch & thread problems
Spandex
A highly elastic synthetic fibre (polyurethane) that stretches many times its length and recovers, blended in small percentages into wovens and knits for stretch.
beginner · Synthetic & regenerated fibres
Spool pin
A small upright post on a sewing machine that holds the thread spool in place as thread feeds off toward the tension discs and needle.
beginner · Machine anatomy
Stains and fabric rescue
Treating a stain successfully depends on identifying whether it's oil, protein, tannin, or dye based and acting before it sets or gets heat-treated by drying. Blot rather than rub, and test any remover on a hidden area first.
beginner · Fabric rescue & care
Stash
A sewist's personal accumulated collection of fabric, patterns, or notions, kept on hand for future projects rather than used immediately.
beginner · Community slang & abbreviations
Stashbusting
Deliberately choosing to sew projects using fabric or patterns already owned, specifically to reduce an accumulated stash rather than buying anything new.
beginner · Community slang & abbreviations
Static cling while sewing
Fabric clinging to itself or the machine bed, distorting seams, is caused by low humidity and synthetic fibers building static charge. A light water mist, anti-static spray, or humidifier reduces the effect.
beginner · Fabric handling problems
Stay-stitching
A line of regular straight stitching sewn just inside the seamline through a single layer, to keep curved or bias edges from stretching out of shape while handling.
beginner · Construction terms
Steam iron
An iron that releases pressurized steam through vents in its soleplate to help relax fibers and set creases and seams.
beginner · Pressing tools
Steam pressing
Using steam heat with an iron to shape, flatten, or set fabric and stitching without excessive direct pressure, useful for wool and shaping curves.
beginner · Pressing
Stem stitch
Hand embroidery stitch worked in overlapping slanted stitches along a line, producing a narrow twisted rope effect used for outlines, stems, and lettering.
beginner · Embellishment & surface design
Stitch length
The distance the feed dogs advance fabric between needle penetrations, typically measured in millimeters, adjustable for basting, regular sewing, or reinforcement stitching.
beginner · Stitches & settings
Straight of grain
Another name for the lengthwise grain, marked with an arrow on pattern pieces to show how they should align on the fabric.
beginner · Fabric & grain terms
Straight pin
A slender metal fastener used to hold fabric layers in place before stitching; mass-produced brass pins from the 1830s replaced costly handmade ones and became a household essential.
beginner · Sewing technology history
Straight skirt draft
A skirt draft that follows the basic skirt block closely, producing a fitted silhouette that falls straight from the hip to the hem with minimal added flare.
beginner · Drafting skirts & trousers
Straight stitch
The most basic machine stitch, formed by a single needle thread interlocking with a bobbin thread in a straight line, used for most seams and construction.
beginner · Stitches & settings
Straight-leg trousers
Trousers with a leg width that remains consistent from the knee to the hem, following the natural line of the leg without flare or taper.
beginner · Trousers & shorts
Stretch stitch
A specialized machine straight stitch that sews with a slight forward-and-back motion, allowing the seam to stretch without breaking thread on knit fabrics.
beginner · Knits & stretch
Stretched necklines
A neckline that gapes and has lost its shape usually comes from cutting on the bias without stabilizing, or handling the edge too much before finishing. Stay-stitch the neckline immediately after cutting.
beginner · Fit & construction problems
Sustainable fashion
An approach to clothing design, production, and consumption aimed at minimizing environmental harm and social exploitation across a garment's life cycle, gaining wider industry attention from the 2000s onward.
beginner · Fashion industry & ethics
Swatch
A small sample cut of fabric, kept for reference or used to test stitches, tension, or shrinkage before a full project is cut.
beginner · Community slang & abbreviations
Sweatshirt fleece
A mid-weight cotton or cotton-blend knit with a brushed fleece back and smooth jersey face, the standard fabric for hoodies and sweatshirts.
beginner · Knit fabrics
Sweatshop
A manufacturing workplace characterized by long hours, low pay, and unsafe conditions, historically associated with garment production since the Industrial Revolution and a continuing concern in global fashion supply chains.
beginner · Fashion industry & ethics