What each one is
The body measurement chart is the company's standard body — the set of proportions every size in the range was drafted from. It tells you which size the drafting system thinks you are. It says nothing at all about what the garment will look like.
The finished garment measurements are the dimensions of the sewn garment: the actual circumference of the bust, waist and hip once the seams are closed. This is the number you will be wearing.
The gap between them is ease. Finished minus body, at each point, is how much room the designer built in — and it is a design decision, not a tolerance.
Where to find them
- The body chart is on the back of the envelope, in the pattern instructions, and on the company's website. On this site it is also in the calculator, for every brand at once.
- Finished measurements appear in one of three places, and often more than one: printed directly on the tissue at the bust, waist and hip lines; in a separate table in the instructions or on the envelope back; or, for length, in a list of finished lengths per view.
Printing on the tissue is the oldest convention and still the most useful, because it puts the number exactly where the measurement is taken. If you cannot find it anywhere, you can measure the pattern piece yourself — see below.
Why the body chart alone will mislead you
Take two patterns drafted from the same body chart: a fitted shirt dress and an oversized coat. Same size, same body measurements, wildly different finished measurements. If you choose by body measurement alone you get a garment that fits the drafting assumption and may be nothing like what you wanted.
The mismatch is sharpest at the extremes. In a heavily eased design, the size that matches your body may produce something enormous. In a close-fitting one, particularly a knit, the finished bust may be smaller than your bust and that is correct rather than a mistake.
Some brands are systematically roomier than their body chart suggests — Merchant & Mills patterns, for instance, are cut generously, so reading their body chart in isolation understates how the garment will sit. With that kind of house style, the finished measurements are not a cross-check; they are the primary number.
How to use them properly
- Find a garment you own and like in a similar shape and fabric weight.
- Measure it flat, buttoned or zipped, laid smooth. Measure across the front at the fullest part of the chest, from seam to seam, and double it. Do the same at the waist and hip. That gives you a finished circumference to compare directly.
- Compare it to the pattern's finished measurements, not to your body. If your favourite shirt is 44 inches around the bust and the pattern's finished bust at your size is 38, you now know precisely what you are choosing between.
- Decide which size gives you the finished measurement you want, then check what that implies about the upper body — see the caution below.
A worked example. Your full bust measures 38 inches. A pattern's body chart puts 38 at size 16, and the finished bust for size 16 is 44 inches. That is six inches of ease.
The shirt you wear constantly measures 42 inches around when laid flat and doubled. Cutting the 16 will give you a shirt two inches roomier than the one you like.
Dropping to the size below might land the finished bust nearer 42 — but it also narrows the shoulder, the armhole and the neckline, which were fitting perfectly well. The usual answer is to keep the size the upper body needs and remove the extra width at the side seams, rather than to change size for a circumference problem.
Measuring the pattern yourself
If no finished measurements are given, measure the tissue. On the front and back pieces, find the bust line — usually marked, or level with the underarm point — and measure the width of each piece at that line. Subtract the seam allowances at each vertical seam, add the pieces together, and double if the piece is cut on the fold.
Take out anything that is not circumference: darts folded closed, pleats, gathers, wrap overlap, and button extension beyond the centre front. What remains is the finished bust. It is a fiddly ten minutes and it settles the question completely.
Where finished measurements stop being useful
They are a circumference at one horizontal line, and plenty of fit problems live elsewhere. A finished bust figure tells you nothing about the armhole depth, the bicep, the shoulder width or where the waist actually falls on you. It also tells you nothing about a gathered, wrapped or bias-cut garment where the number bears little relation to how it hangs.
And on a very loose design, matching a finished measurement precisely is beside the point. Nobody notices two inches on an oversized coat; everybody notices two inches on a fitted bodice.
Finished lengths
The same logic applies vertically. Patterns usually publish a finished back length, measured from the centre back neck down, and finished skirt or sleeve lengths per view. Compare those to a garment you already own before you cut, because it is far easier to shorten at the lengthen-and-shorten line than to discover the hem lands somewhere you did not intend. That is covered in petite and tall adjustments.
General guidance following standard commercial pattern conventions for body and finished garment measurements. Where a pattern company's own instructions or printed measurements differ, follow theirs — they drafted the block. Not professional fitting advice.