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Gauge and the swatch
What gauge means, how to make and measure a swatch that tells the truth, and what to change when yours does not match.
By The StudioPublished Jul 1, 20265 min read
Gauge is the number of stitches and rows that fit in a measured square, usually 10 cm (4 in). It is how a pattern turns stitch counts into centimeters. If your gauge matches the pattern, your sweater comes out the size the schematic says. If it is off by a stitch over 10 cm, a sweater with 200 stitches around is 15 cm off. That is the whole reason to swatch, and for anything that has to fit, it is not optional.
When you can skip it
Scarves, dishcloths, blankets where the size does not matter much, and toys where a slightly different size is fine. Even then, a swatch tells you whether the fabric feels right and whether you have enough yarn, so it is rarely wasted. For hats, garments, bags with a specific capacity and anything with yardage that is close to what you have, swatch.
Making a swatch that tells the truth
- 1Use the yarn and hook the pattern suggests, and the stitch the gauge is given in. If the gauge says double crochet, swatch in double crochet; if it says pattern stitch, use the pattern stitch.
- 2Make it bigger than 10 cm: aim for about 15 cm (6 in) square so you can measure away from the edges, which are always distorted.
- 3If the project is worked in the round, swatch in the round. Many people crochet a different size in rounds than in rows.A quick way: work a tube and measure the flat side, or work back and forth but cut the yarn at the end of every row and start again from the right side.
- 4Wash and dry the swatch the way you will treat the finished item. Wool relaxes, cotton grows, acrylic stays; the pattern's gauge is after blocking unless it says otherwise.
- 5Lay it flat without stretching. Put pins 10 cm apart in the middle of the swatch and count the stitches between them, including half stitches. Do the same vertically for rows.
Reading the result
| Your count vs the pattern | Your stitches are | Change |
|---|---|---|
| More stitches in 10 cm | Too small | Go up a hook size |
| Fewer stitches in 10 cm | Too large | Go down a hook size |
| Stitches match, rows do not | Fine for width | Usually accept it; adjust length by measuring, not counting |
Change the hook, not your tension. You can force yourself to crochet tighter for a swatch, but you cannot keep it up for a sweater; your hands go back to their natural gauge within a few rows. The hook size in the pattern is a suggestion; the right hook is whichever gives you the gauge. If you are between sizes, choose based on the fabric you prefer and adjust the size you make.
Stitch gauge versus row gauge
Stitch gauge sets the width, and width is fixed by the stitch count, so it must match. Row gauge sets the length, and most patterns give lengths in centimeters and say to work until the piece measures a certain length, so a different row gauge is usually harmless. Where row gauge does matter is in shaping worked over a fixed number of rows, such as a raglan yoke or a sleeve cap. Garment patterns in this shop flag those sections and give both a row count and a measurement.
Gauge changes over a project
Most people loosen up as they relax into a project and tighten when they are tense or working fast. Check your gauge again after the first 15 cm of the real piece, without cutting anything: lay it flat and count. If it has drifted, change hook size for the rest and it will not show. A swatch also tells you if the yarn behaves as expected: if a superwash wool swatch grew 10 percent in the wash, the sweater will too, and you can plan for it.
Keep the swatch
Label it with the yarn, hook and the gauge you got, and keep it with your project notes. It is your reference if you set the project down for a month, it is a test piece for washing before you risk the finished thing, and if you ever run short of yarn it is 15 square centimeters of the right dye lot. For garments, the pattern pages in this shop list the gauge after blocking in the specs section; make the swatch match that number and the schematic will be true.
Keep reading
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Seaming
Mattress stitch, whipstitch, backstitch and crocheted seams: which to use where on a garment, how to match rows, and how to make a seam disappear.
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Understanding garment sizing and ease
Why a size 3 in one pattern is not a size 3 in another, how ease decides the fit, how to measure yourself, and how to pick a size from a schematic.
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Blocking
Wet, spray and steam blocking: what each does, which fibers want which, and how to pin a shawl or a sweater so it dries into the size on the schematic.
