Product Development

Tech Pack Graded Measurement Generator

If the tolerance band is as wide as the grade step, two adjacent sizes are the same garment as far as QC is concerned.

Base Size Sample size
cm
cm
Size Run Either side of base
no.
no.
Quality Spec tolerance
cm

Largest Size Measurement

— cm

Base measurement graded up across the run

Size Run

Smallest Size Measurement
— cm
Sizes in the Run
— no.
Span of the Run
— cm
Full Tolerance Band
— cm
Tolerance Band vs Grade Step
— %

An overlap ratio at or above 100% means the tolerance band is wider than the grade step and adjacent sizes are indistinguishable on this measurement — tighten the tolerance or widen the grade. Grade rules are rarely uniform across a full run; verify the top and bottom sizes against the pattern rather than assuming linear grading throughout.

Tech Pack Graded Measurement Generator — free, with the formula and a worked example, at Textile School.