Finished garment measurements calculator
Enter your pattern’s two charts: the body-size chart and the finished-garment measurement chart, plus your own measurements. Get a size at every body point, the ease at each one, and a checklist to test before you cut fabric.
SizeSpan reads both charts a sewing pattern gives you: the body-size chart and the finished-garment measurement chart. It returns a size at every body point: high bust, shoulder, bust, waist, hip, and length. The ease at each one (finished garment − body measurement), and a blend path such as 12 at shoulders and high bust → 16 at full bust → 14 at waist.
Your measurements
Only the ones you have. Anything left blank simply doesn’t get a recommendation.
Width across the shoulders. Usually sized together with the high bust.
Also called upper bust. Measured above the bust, under the arms. This is the usual anchor for shoulder and neckline sizing, which is why it matters more than most charts admit.
Measured around the fullest part of the bust.
The natural waist. The narrowest point, usually just above the navel.
Around the fullest part of the seat.
Usually back waist length: nape of the neck to the natural waist.
The pattern’s body chart
The sizing table on the envelope. The body each size was drafted for.
One line per body point, names in plain words. A sizes: line names the columns; a unit on a number (34.5 in) is converted for you. Anything we can’t read, we’ll tell you about rather than guess.
No columns yet. Paste a chart above, or add a size and type the numbers in.
Values are currently in cm. Switch units above to convert everything.
The pattern’s finished-garment chart
optionalThe chart of the sewn garment’s actual measurements. Without it you still get sizes but no ease, because we won’t invent one.
One line per body point, names in plain words. A sizes: line names the columns; a unit on a number (34.5 in) is converted for you. Anything we can’t read, we’ll tell you about rather than guess.
No columns yet. Paste a chart above, or add a size and type the numbers in.
Values are currently in cm. Switch units above to convert everything.
What makes it different
It works from the pattern’s own numbers. You type in this pattern’s charts, so it works for Big 4, indie, or a vintage envelope. No size database, no brand lock-in.
It shows the arithmetic. Every recommendation comes with the sums that produced it, one click away. You can disagree with it and still be better off than you were with the chart alone.
It admits what it doesn’t know. If the envelope has no finished-garment measurement, or the ease looks implausible, or the advice assumes a woven when your fabric stretches, then it says so, in words, instead of returning a confident number.
It will not tell you “cut a 14”
A single flat size is a guess dressed as advice. The useful version of this job is a blend, with the ease written down next to it, and a toile before the good fabric.
Not for knitting or crochet yet
This one is for sewn garments made from a pattern that publishes both a body chart and a finished-garment chart. Incoming feature!
Questions
What’s the difference between body measurements and finished garment measurements?
The body chart describes the body the pattern was drafted for. The finished-garment chart describes the actual sewn garment. The gap between them is ease, which is why the same nominal size fits differently from one pattern company to the next.
Which size do I cut if I’m between sizes?
You blend: one size at the high bust and shoulders, another at the full bust, another at the waist. That is what the blend path above is for. Test it on a toile before cutting into the good fabric.
Do I need the finished-garment chart?
You’ll get more from the tool if you have it. Without it, SizeSpan can only reason from the body chart and it will tell you that’s what it’s doing, rather than invent an ease.
Does it grade, resize or convert a PDF pattern?
No. It doesn’t touch the pattern file. It interprets the numbers you give it.