Observed arrival · 2026-09-25
SizeSpan: a sewing-pattern fit calculator
A free calculator compares your measurements with a sewing pattern’s body-size and finished-garment charts to estimate size, ease, and where to blend sizes.
○Open
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$Paid
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Home sewists choosing sizes from commercial patterns
- Worth noticing
- If a pattern omits finished-garment measurements, the calculator withholds ease rather than supplying a guessed value.
Field notes
The input form separates six measurement points and lets users leave unknown measurements blank. Pattern charts can be pasted as lines of values or entered size by size; the page says it converts units and reports unreadable entries rather than guessing. Its example demonstrates a blended recommendation across three sizes, and it cautions users to make a toile before cutting good fabric.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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