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What is "Seam Allowance" - Definition & Explanation

The amount of fabric extending beyond a seam and not visible once the seam is sewn.
Narrow width between the seam line and the raw edge of the fabric. Seam allowances vary depending on where they occur on the garment and the manufacturers' specifications. Home sewing patterns generally have a 5/8" seam allowance except at hems. Commercial patterns generally use 1/4" to1/2" except at hems.
The width of fabric between the sewn seam and the cut edge. Traditionally 1/4 inch.

Some other terms

Some more terms:

A bikini is a type of women's bathing suit, characterized by two separate parts—one covering the breasts, the other the groin and buttocks, leaving an uncovered area between the two...
Trade name for a polyester fibre. It blends well with other fibres, can be bleached and takes dye well. Used mainly in the manufacture of clothing, curtaining, furnishings, and fillings for pillows...
A yarn composed of one or more filaments (q.v.) that run the whole length of the yarn. NOTE: Yarns of one filament and yarns of several filaments are referred to as mono-filament and...
A fine, closely woven, lustrous cotton or cotton/poly blend made in plain weave with a fine rib in the direction of the filling (across). The filling yarn is heavier and has less twist than the warp...
An alternative, non-harmful method of producing silk. Silk is woven by making use of empty cocoons rather than harvesting live moth pupae. Cultivated on forest trees, the silk is spun after the...

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