TRANSPARENT BY DESIGN

How the pattern data and Match Score work

The score is a rule-based comparison, not a probability and not a substitute for the pattern designer's requirements.

Sew Ideas uses a small, manually curated pattern list. It compares fabric suitability, available length, width, skill and optional details, then shows the highest-scoring discovery matches.

What we record

Each record contains only minimal factual metadata needed for discovery: pattern name, maker, garment category, original URL, recommended fabric groups, supported width groups, skill band and an approximate discovery range. We do not host pattern files, copy pattern instructions or reproduce pattern photography.

The 100-point rule score

ComponentMaximumRule
Fabric suitability2525 for an exact curated fabric tag; 20 for a related broad fabric family.
Available length25Full points at or above the conservative discovery minimum; proportional below it.
Width compatibility20Full points for a supported width; 10 when width is unknown.
Skill match15Beginner patterns score fully; confident-beginner patterns depend on the user's selection.
Detail confidence15Weight and stretch can raise or lower a neutral starting score.

Scores of 85-100 are labeled Strong Match, 70-84 Good Match, and 55-69 Possible Match. Anything below 55 or with an incompatible fabric family is hidden.

Why yardage is a range

A single pattern can require different lengths for every size, view and fabric width. Directional prints, nap, shrinkage, pattern matching and cutting layout add more variation. The displayed range is deliberately described as a discovery range. The original pattern page remains the final authority.

Confidence labels

Source and rights policy

Pattern metadata is curated from publicly visible original pattern pages and relevant designer roundups. Only factual fields needed for linking and comparison are retained. Pattern names and linked content remain the property of their respective owners. Fabric guides use original explanatory text informed by textile manufacturers and established sewing education resources.

Known limitations

Reference library

Last reviewed: August 9, 2026. Material changes are documented in the project history.