Provenance
Sources and derivations
Every citation ID resolves to a record with title, publisher, URL, access date, support scope, and review notes.
SI Units — Length
- Source ID
core-unit-factors- Publisher
- National Institute of Standards and Technology
- Accessed
- 2026-07-13
- Supports
- The exact inch-to-millimeter definition and consistent SI length conversion policy.
- Notes
- Core factors are encoded once in the sewing-core package and reference values are generated from those functions.
Deterministic rectangular shelf-layout derivation
- Source ID
derived-layout-method- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Row placement, rotation gating, layout length, utilization, and non-optimality disclosure.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Fabric purchase adjustment derivation
- Source ID
derived-purchase-policy- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Shrinkage reversal, explicit waste, and upward shop-increment rounding order.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Pattern repeat allowance derivation
- Source ID
derived-repeat-formula- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Vertical repeat ceiling and separate horizontal alignment offset.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Cut dimension allowance derivation
- Source ID
derived-cut-dimensions- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Finished width and height plus independent opposing edge allowances.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Parallel Curves
- Source ID
parallel-curve-geometry- Publisher
- Wolfram MathWorld
- Accessed
- 2026-07-22
- Supports
- A curved offset is constructed at a constant distance in the local normal direction rather than by scaling the whole shape from one center.
- Notes
- Used only for the geometric definition of an offset curve; sewing construction choices still defer to the pattern instructions.
Uniform print scale correction derivation
- Source ID
derived-print-scale-formula- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Intended calibration divided by measured calibration with a separate desired scale.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Adjust page size for printing PDFs in Acrobat
- Source ID
adobe-pdf-page-sizing- Publisher
- Adobe
- Accessed
- 2026-07-24
- Supports
- The distinction among Fit, Actual size, Shrink oversized pages, and a user-entered Custom Scale in Acrobat printing.
- Notes
- Adobe documents the PDF viewer controls only; the pattern maker still controls the intended paper size, calibration target, and acceptable tolerance.
Binding strip and area derivation
- Source ID
derived-binding-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Fold multipliers, strip joins, continuous-bias area, and square-side estimate.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Sewing Shortcuts — Idea 13: Continuous Bias
- Source ID
nmsu-continuous-bias-method- Publisher
- New Mexico State University Cooperative Extension Service
- Accessed
- 2026-08-05
- Supports
- The construction sequence of cutting on the bias, joining the straight edges, marking parallel strip widths, offsetting the tube by one strip width, and cutting one continuous path.
- Notes
- Used for the method sequence only; the area estimate, equal-area square, reduced-scale model, and project allowance remain Sew Measure derivations or project-specific checks.
Sewing Q&A — Bias Binding
- Source ID
american-sewing-guild-bias-binding- Publisher
- American Sewing Guild
- Accessed
- 2026-08-03
- Supports
- True bias as a 45-degree direction to the selvage, its use for curved edges, straight-grain strips for edges without curves, and diagonal seams for distributing join bulk.
- Notes
- Used for cutting direction, edge-shape choice, and join construction only; the entered joining loss and strip-count inequality remain project measurements and Sew Measure derivations.
5.1 Angles — Relating Arc Lengths to Radius
- Source ID
openstax-arc-length- Publisher
- OpenStax
- Accessed
- 2026-07-27
- Supports
- Arc length s equals radius r multiplied by the central angle in radians, and one full revolution equals 2π radians.
- Notes
- Used for the geometry relationship only; allowances, footprint screening, fabric behavior, and construction choices remain Sew Measure derivations or pattern-specific decisions.
Circle sector radius and footprint derivation
- Source ID
derived-circle-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Arc-angle radii and conservative sector bounds.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Sample Techniques No. 815 — Pleats
- Source ID
oklahoma-extension-pleats- Publisher
- Oklahoma Cooperative Extension Service
- Accessed
- 2026-07-29
- Supports
- Knife pleats turn to one side, box-pleat pairs turn away from each other, inverted-pleat pairs turn toward each other, and pattern markings may distinguish fold, roll, and placement lines.
- Notes
- Used for fold-direction and marking terminology only; fullness ratio, repeat count, remainder distribution, and project construction remain calculated or pattern-specific.
Dropped Waist Skirt with Ruffles
- Source ID
usu-extension-ruffle-fullness- Publisher
- Utah State University Extension
- Accessed
- 2026-07-31
- Supports
- A project-specific choice between 1.5× and 2× ruffle fullness, plus matching quarter points and evening the gathers between them.
- Notes
- Used as one documented project example and for the quarter-mark distribution method, not as a universal fullness recommendation for every fabric or project.
Pleat and gather fullness derivation
- Source ID
derived-fullness-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Source width, take-up, whole repeat count, and remainder.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Curtain panel and cut-drop derivation
- Source ID
derived-curtain-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Fullness width, usable panel width, panel count, cut drop, and repeat rounding.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
4-H Home Arts
- Source ID
uc-anr-home-arts-curtains- Publisher
- University of California Agriculture and Natural Resources
- Accessed
- 2026-08-07
- Supports
- A documented curtain project that measures a top ruffle at twice the rod length, adds separate heading and hem allowances, and flags patterned fabric for matching during cutting.
- Notes
- Used as one construction example, not as a universal fullness recommendation; whole-width ceiling, achieved-ratio reconciliation, and total cut length remain Sew Measure derivations.
Cushion cover cut-piece derivation
- Source ID
derived-cushion-formulas- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Zippered and envelope pieces, overlap, piping perimeter, and rectangular layout.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Before-cutting calculation review method
- Source ID
calculation-review-method- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- Input traceability, hand reconciliation, warning review, and physical template verification.
- Notes
- Original dimensional derivation, hand fixture, boundary test, and automated regression coverage maintained with the calculator source.
Commercial pattern precedence policy
- Source ID
pattern-instruction-precedence- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- The rule that specific tested commercial pattern dimensions and instructions override general site calculations.
- Notes
- This is a scope and editorial policy, not a reproduction of any commercial pattern content.
Qualified retail fabric-width observation record
- Source ID
retail-width-observation- Publisher
- Sew Measure
- Accessed
- 2026-07-13
- Supports
- 44, 45, 54, and 60 inches as common retail examples rather than universal categories.
- Notes
- Every public mention includes a qualification to verify the selected bolt and usable width.