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Tunnelling on knits
A raised ridge forming along a line of stitching on stretch fabric happens when tension is too tight or the stitch is too dense for the fabric's give. Loosen tension and use a walking foot with a stabilizer.
intermediate · Stitch & thread problems
Twill tape
A flat, tightly woven twill-weave tape used to stabilise seams, reinforce waistbands, and bind edges without adding bulk.
intermediate · Trims & tapes
Twin needle
A sewing machine needle with two shafts joined to a single shank, producing two parallel rows of stitching on top and a zigzag underneath, used for hems on knits.
intermediate · Threads & needles
Twin needle hem
A hem stitched with a double needle to create two parallel rows of straight stitching on top and a zigzag-like stretch stitch underneath, standard for knit hems.
intermediate · Knits & stretch
Twisted seams
A side seam or inseam that spirals around the leg or body instead of running straight comes from pieces cut off-grain or one layer eased more than the other while sewing. Recut on true grain where possible.
intermediate · Fit & construction problems
Underarm dart
A bust dart originating from the side seam near the underarm and pointing toward the bust apex, one of the most common dart placements in bodice drafting.
intermediate · Drafting bodices
Uneven feed
When top and bottom seam layers creep apart, unequal feed pressure or a fabric mismatch is usually to blame. Use a walking foot, hand-baste slippery layers together, or ease the top layer as you sew.
intermediate · Machine problems
Uneven understitching
Understitching that wanders away from the seamline, leaving the facing visible from outside, comes from sewing too fast or not keeping seam allowances pressed toward the facing. Slow down and hold allowances flat as you stitch.
intermediate · Finishing problems
Utility clothing scheme (CC41)
A British wartime program launched in 1941 that standardized clothing designs to conserve fabric and labor, marking approved garments with a 'CC41' label denoting Controlled Commodity.
intermediate · Fashion industry & ethics
Vanity sizing
The industry practice of labeling ready-to-wear garments with smaller size numbers than their actual measurements would traditionally indicate, to flatter shoppers.
intermediate · Measurement terms
Velour
A soft, thick knit or woven pile fabric with a plush, velvet-like nap and stretch, often used for loungewear and dancewear.
intermediate · Knit fabrics
Velveteen
A cotton pile fabric woven with a short, dense cut pile similar to velvet but with a shorter nap and more matte finish, easier to sew than true velvet.
intermediate · Speciality fabrics
Vent
A slit left open at the hem of a jacket, coat, or skirt to allow ease of movement, finished with an overlapping or underlapping facing.
intermediate · Garment components
Vinyl (fabric)
A non-woven or fabric-backed plastic sheet material with a glossy or matte coated surface, used for waterproof garments and accessories; sewn with a walking foot or Teflon presser foot.
intermediate · Speciality fabrics
Viscose rayon
A regenerated cellulose fibre made from wood pulp, offering silk-like drape and breathability but weak when wet and prone to shrinking.
intermediate · Synthetic & regenerated fibres
Visible mending
A repair technique that highlights rather than hides the fix, using contrast thread, sashiko stitching, or colorful patches over a hole or worn area. It turns damage into a deliberate design feature.
intermediate · Mending & repair
Vogue Patterns
A prestige American pattern line launched in 1899 from Vogue magazine, later known for licensing designer patterns from couturiers such as Dior, Balenciaga, and Yves Saint Laurent from the 1950s onward.
intermediate · Paper patterns & home sewing
Waistcoat
A sleeveless, fitted upper-body garment worn over a shirt and beneath a jacket, traditionally with a front closure and back adjustment strap.
intermediate · Children & menswear
Walking foot
An attachment with its own set of feed dogs that grips fabric from above in sync with the machine's lower feed dogs, preventing layers from shifting on bulky or slippery fabric.
intermediate · Presser feet
Walking foot seaming
Sewing with a walking foot that feeds top and bottom fabric layers evenly, preventing knit or slippery fabrics from shifting or stretching unevenly while stitching.
intermediate · Knits & stretch
Wallet (sewing)
Small flat case pattern with compartments for cards, cash, and coins, constructed from fabric and interfacing panels and closed with a snap, zip, or fold.
intermediate · Bags & accessories
Wardrobe architect
A structured wardrobe-planning approach, popularized by a well-known online course, for building a cohesive handmade wardrobe around a person's real needs and style.
intermediate · Community slang & abbreviations
Warp
The lengthwise threads held taut on a loom during weaving, running parallel to the selvedge in a piece of woven fabric.
intermediate · Fabric & grain terms
Water spotting from steam
Dark rings left on silk or other delicate fabric after steaming come from mineral-laden water droplets drying unevenly. Use distilled water in the iron, press through a dry cloth, and test steam on scrap first.
intermediate · Pressing problems
Wavy hems
A hem edge that ripples instead of lying flat, common on flared skirts, comes from turning up a curved edge without easing out the extra fullness. Ease-stitch the raw edge and steam out the fullness before turning.
intermediate · Fit & construction problems
Wearable muslin
A fit-testing garment that was expected to be purely disposable but turns out well enough that the sewist actually wears it afterward.
intermediate · Community slang & abbreviations
Wearing ease
The minimum extra room built into a pattern beyond a person's exact body measurements, needed so a finished garment can be put on and moved in comfortably.
intermediate · Pattern terms
Weft
The crosswise threads woven over and under the warp threads to construct a woven fabric, also known as the fill or the woof.
intermediate · Fabric & grain terms
Welt seam
A seam pressed to one side with the underneath allowance trimmed narrower, then topstitched through both layers for a flat, durable finish.
intermediate · Seams
Wheelchair-friendly clothing adaptation
Garment modifications, such as higher back rises, seam relocation, and adjusted hem lengths, that improve fit and comfort for a seated wheelchair user.
intermediate · Adaptive & maternity
Wholesale
Selling garments or fabric in bulk quantities to retailers at a reduced price, rather than selling individual pieces directly to consumers.
intermediate · Industry & business terms
Wide back
A back width broader than the standard pattern block assumes, causing the back pattern piece to feel tight across the shoulder blades and restrict arm movement.
intermediate · Fitting problems
Wide-leg trousers
Trousers cut with a generous, uniform width from hip to hem, producing a straight silhouette that does not taper toward the ankle.
intermediate · Trousers & shorts
Wool industry (history)
The processing of sheep's fleece into yarn and cloth was a foundation of medieval and early modern European economies, particularly in England and Flanders, before mechanization in the Industrial Revolution.
intermediate · Textile history
Woven interfacing
Interfacing constructed with lengthwise and crosswise threads like conventional fabric, cut on grain to match the garment fabric and provide stable, non-stretch support.
intermediate · Interfacing & stabilisers
Wrong sides together
Positioning two layers of fabric so their unfinished, wrong sides touch each other, leaving the right sides visible, as used for some enclosed seams.
intermediate · Fabric & grain terms
Yellowing on stored whites
White fabric developing a dingy yellow cast after long storage comes from oxidation, residual body oils, or trapped moisture in fold lines. Soak in oxygen bleach and store clean whites with acid-free tissue, not plastic.
intermediate · Fabric rescue & care
Yoke
A shaped panel, usually at the shoulders or hip, that fits closely to the body and to which fuller sections of fabric are attached below or beyond it.
intermediate · Garment components
Yoke draft
The process of separating a design line, such as a shoulder or back panel, from a bodice block to create a yoke pattern piece, often absorbing dart shaping into its seam.
intermediate · Drafting bodices
Yves Saint Laurent
French designer who succeeded Christian Dior in 1957 at age 21, later founding his own house in 1961 and introducing garments such as Le Smoking, a tuxedo suit for women, in 1966.
intermediate · Couture houses & designers