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Baby bib
Small garment tied or snapped around an infant's neck to protect clothing while feeding, typically made with absorbent or wipeable fabric and a curved neckline.
beginner · Children & menswear
Back bodice draft
The portion of a bodice draft that shapes the back torso pattern, incorporating the shoulder blade dart or ease, waist shaping, and armhole curve calculated from back body measurements.
intermediate · Drafting bodices
Back waist length
The vertical distance from the prominent bone at the base of the neck to the natural waistline, used to check and adjust bodice length on a pattern.
beginner · Measuring
Backpack straps
Padded, adjustable shoulder straps constructed with webbing and sliders, engineered to distribute a backpack's weight and attach securely to its body at multiple points.
intermediate · Bags & accessories
Backstitch
A strong hand stitch made by inserting the needle behind the previous stitch's end, producing a solid, continuous line similar to machine stitching.
beginner · Hand sewing
Backstitching
Reversing the machine over the first and last few stitches of a seam to lock the thread ends so the seam will not unravel.
beginner · Construction terms
Bag base insert
Rigid or semi-rigid panel, of plastic canvas, cardboard, or heavy interfacing, inserted into the bottom of a bag to help it hold its shape and stand upright.
intermediate · Bags & accessories
Bag hardware
Metal or plastic fittings such as D-rings, swivel clips, rivets, and sliders used to attach straps, close flaps, and reinforce stress points on bags.
beginner · Fastenings & hardware
Bag strap
Fabric or webbing band attached to a bag to allow it to be carried by hand or over the shoulder, constructed as a folded tube, topstitched strip, or webbing length.
beginner · Bags & accessories
Bagging out
A technique for constructing and turning a fully lined garment, such as a jacket, right side out through a small opening so all raw edges end up enclosed.
advanced · Linings & interfacing
Balance (garment fit)
The state of a garment hanging evenly on the body with its seams and grainlines running true, without twisting toward the front, back, or one side.
intermediate · Toiles & fitting process
Balance marks
Marks placed on pattern pieces to indicate where two edges of different lengths, such as a sleeve cap and armhole, should align during construction so ease is distributed correctly.
beginner · Pattern markings & conventions
Ballpoint needle
A sewing machine needle with a rounded tip designed to slide between the loops of knit fabric rather than piercing and breaking the yarns.
beginner · Threads & needles
Bamboo fibre
A regenerated cellulose fibre processed from bamboo pulp, marketed for softness and breathability though chemically similar to viscose rayon.
intermediate · Synthetic & regenerated fibres
Bar tack
A short, dense zigzag or hand-worked reinforcement stitched at points of stress, such as pocket corners or fly ends, to prevent seams from tearing open.
intermediate · Couture
Bar tack machine
An industrial machine that sews a small, dense block of zigzag stitches to reinforce stress points such as pocket corners and belt loops.
advanced · Industrial machines
Barrel cuff
A single-layer shirt cuff fastened with one or two buttons, named for its cylindrical shape when closed around the wrist.
beginner · Sleeves & cuffs
Barthélemy Thimonnier
French tailor who patented an early chainstitch sewing machine in 1830 to make army uniforms; rioting tailors, fearing job losses, destroyed his workshop in 1831.
advanced · Sewing technology history
Base layer
A close-fitting garment worn next to the skin beneath other clothing, designed to wick moisture and regulate body temperature during activity.
beginner · Activewear
Basic block
A general term for any foundational, unfitted-detail pattern piece—such as a bodice, skirt, sleeve, or trouser block—from which other pattern designs are developed.
beginner · Pattern blocks
Basting
Long, loose, temporary stitches, sewn by hand or machine, used to hold layers of fabric in place for fitting before permanent stitching.
beginner · Construction terms
Basting stitch
A long, loose straight stitch used to temporarily hold fabric layers together for fitting or easing before permanent stitching is sewn.
beginner · Stitches & settings
Batik
A wax-resist dyeing technique in which molten wax is applied to fabric to block dye from certain areas, producing intricate patterns; long practiced in Indonesia, especially Java, and recognized by UNESCO in 2009.
intermediate · World sewing traditions
Batiste
Fine, lightweight, closely woven fabric, softer and slightly more opaque than voile, traditionally cotton or linen, used for blouses, baby clothes, and heirloom sewing.
beginner · Woven fabrics
Batting (quilting)
Layer of loose fibre wadding, made from cotton, wool, polyester, or blends, used as the insulating middle layer of a quilt sandwich or a padded garment.
beginner · Speciality fabrics
Bead embroidery
Surface embellishment technique in which beads are stitched individually or in strings onto fabric with a beading needle and thread to create texture, pattern, or sparkle.
intermediate · Embellishment & surface design
Bell sleeve
A sleeve fitted at the shoulder that flares progressively wider toward the wrist, producing a bell-shaped silhouette at the hem.
intermediate · Sleeve types
Bemberg rayon
A trademarked lightweight cupro rayon lining fabric prized for a silk-like hand, breathability and antistatic properties compared with polyester linings.
intermediate · Linings
Bent needle
A needle that clicks against the plate or skips stitches is often bent from nicking a pin or age. Replace it immediately, since a bent needle can also throw off hook timing.
beginner · Machine problems
Bermuda shorts
Tailored shorts with a hem ending just above the knee, cut with a fitted waist and straight or slightly tapered leg.
beginner · Trousers & shorts
Besom pocket
An inset pocket finished with two narrow folded strips forming lips on either side of a slit opening, commonly used on tailored jackets and trousers.
advanced · Pockets
Bespoke
Originally a term for custom tailoring made entirely to one individual customer's specifications, now used more loosely for any made-to-order garment.
intermediate · Historical terms
Bespoke tailoring
A method of making a garment, typically a suit, individually from a unique pattern drafted to one client's measurements, involving multiple fittings and largely hand-sewn construction.
intermediate · Tailoring traditions
Beta pattern
An early, not-yet-finalized version of a sewing pattern sent out to testers for feedback before the pattern's official public release.
intermediate · Pattern terms
Bias
Any diagonal direction across a woven fabric that is not parallel or perpendicular to the grain, where the fabric has more give and stretch.
beginner · Fabric & grain terms
Bias (sewing)
The diagonal direction across a woven fabric, at 45 degrees to the grainlines, along which fabric has maximum stretch and drape; used for bindings and fluid-cut garments.
intermediate · Fabric properties
Bias binding
A narrow strip of fabric cut on the bias and folded to encase a raw edge, allowing it to curve smoothly around necklines, armholes and hems.
beginner · Trims & tapes
Bias cut
A cutting technique in which pattern pieces are placed at a 45-degree angle to the fabric's grainline, producing extra drape, stretch, and a fluid hang.
advanced · Layout & cutting
Bias distortion
Edges or seams that stretch and lose their shape happen when fabric cut near the bias grain is handled without support. Stay-stitch bias edges promptly after cutting and avoid pulling the fabric while sewing.
intermediate · Fabric handling problems
Bias facing
A narrow strip of bias-cut fabric sewn to an edge and turned to the inside, used to finish curved edges with minimal bulk.
intermediate · Edges & facings