If you’ve ever knit a sweater with sleeves that nearly hit the floor or a hat that flies off your head whenever a strong wind blows, chances are you’ve had gauge problems! “Gauge” has a technical meaning that we’ll get into, but essentially, it’s all about choosing the right needles and yarn for your pattern and your way of knitting… a real balancing act. And since issues with your gauge are very often to blame for why your project doesn’t look, feel, or fit the way you expected, it’s worth your time to learn some basics. We promise to make it as painless as possible!

All About Gauge | Purl Soho

What Is Gauge?

“Gauge” (or “tension”) simply means the number of stitches you knit over either an inch or 4 inches (or 10 centimeters). Patterns always give you a gauge to follow, for example 16 stitches = 4 inches, and you may think that if you use the pattern’s yarn and needle recommendation, you’ll be all set, but that thinking goes out the window when you realize that everyone knits on a spectrum between very loose and very tight, including the person who wrote the pattern! This means you need to find the right needle size and yarn for you and your project, and the way to do this is to knit a fair-sized piece of test fabric, i.e. the dreaded gauge swatch.

All About Gauge | Purl Soho

Same yarn, same cast on number, different needle sizes!

Why so dreaded? Because knitting a gauge swatch prolongs the moment when you get to cast on for the project you’re so excited about. But once you realize that knitting a gauge swatch is just doing more of the thing you love (knitting!), you may actually start to enjoy this step!

How To Make A Gauge Swatch

There are more intense ways to knit a gauge swatch than the way we describe here, but our belief is that a good swatch is better than a perfect one, if it means you’ll actually doing it.  

  • A good goal is to knit a 4 x 4-inch gauge swatch. It needs to be big enough to get a feel of your fabric and also to have different places in your knitting to measure. Many patterns give their gauge over four inches, so you can just cast on that number (if the gauge is 20 stitches = 4 inches, then cast on 20 stitches). If the gauge is given per inch, then multiply the gauge by 4 and cast on that number (so if the gauge is 5 stitches = 1 inch, multiply 5 stitches x 4 inches and cast on 20 stitches). If you have a stitch pattern that repeats, make sure you cast on enough stitches to work at least one full repeat.
  • Work the stitch pattern specified in the gauge section of the pattern (for example, 32 stitches = 4 inches in stockinette stitch) for 4 inches, then bind off. If you have a stitch pattern that repeats vertically, finish at least one full repeat before binding off.
  • Generally, patterns give the gauge of your knitting after it’s been blocked. This is an extra step, but critical, because your gauge can change dramatically after you block it. So, unless you plan to never wash your knitting, take the time to give your swatch a little soak in a bowl of room temperature water with a dash of gentle soap, then rinse and squeeze it, and lay it flat to dry. 
  • Once your swatch is dry, lay it on a flat surface and count your stitches! Just lay a ruler or measuring tape along a row of stitches and count how many “Vs” there are in 4 inches. Measure in a few different places and take the average if the numbers vary. Counting with the tip of a knitting will help you keep track, and be sure to count a quarter, half, or three-quarter stitch if the four-inch mark doesn’t fall at the exact end of a stitch. For examples, the stitch gauge in the example below is 18.75 stitches over four inches.
All About Gauge | Purl Soho
  • If row gauge is important for your pattern, align your ruler along a column of stitches and count rows the same way you counted stitches. For example, the row gauge in the example below is 27 stitches over four inches.
All About Gauge | Purl Soho

TROUBLESHOOTING

  • Too many stitches, i.e. the number of stitches you’re counting is higher than the gauge given? Make another swatch with bigger needles.
  • Too few stitches per inch, i.e. the number of stitches you’re counting is lower than the gauge given?? Try smaller needles!
  • What if your stitch gauge is accurate but the row gauge isn’t? In most cases you should use the needle that gives you the proper stitch gauge. You can probably more easily adjust the length of your piece to compensate for the difference in rows, either by working more or fewer rows than the pattern specifies or when blocking. However, if the garment is fitted and/or involves complex shaping, consider trying a yarn with different properties that gives you correct stitch and row gauges.
  • Do you like it?! Even if you’re getting the correct gauge, you also need to consider the fabric you’re creating. You may find that, at the right gauge, the swatch feels too loose or tight, that it stretches too much or is too fuzzy to show the stitch pattern. You might decide the yarn isn’t a good match for the design after all. Back to the drawing board, which just means you get to knit some more!

These swatches are knit in Purl Soho’s Understory using (NOTE: We no longer offer Understory, but click here to see our other light worsted/dk weight yarns.)

Size isn’t the only factor when it comes to needles; gauge can vary with material (wood, metal, plastic, etc.) and with the use of circular or straight needles, too. For the most accurate results, use the exact needles you intend to use for your project.

Swatches for Other Stitch Patterns

Ribbing

Measuring gauge in ribbed fabric can be a head-scratcher: Isn’t the whole point of ribbing that it can be stretched to a variety of widths? Sometimes the pattern will use wording like “slightly stretched,” but even that is open to interpretation. One good approach is to take a measurement with the ribbing completely relaxed (unstretched), then stretch it to its widest and take another measurement, and use the average of the two. For example, the stitch gauge in this example is 15 stitches over four inches (remember the purl stitches of the rib pattern are hiding!).

All About Gauge | Purl Soho

Garter Stitch

Garter stitch also presents its own set of issues. To count garter stitches, instead of “V”s, count the purl bumps or little “frowns” over a four-inch span. For row counts, patterns in garter stitch may specify gauge in “rows” or “ridges,” which are the pronounced horizontal stripes that span the width of your swatch. Every ridge is two garter stitch rows, so if the pattern specifies rows, count ridges and simply multiply by two to get your row count. For example, the row gauge in this example is 25 rows (or 12.5 ridges) over four inches.

All About Gauge | Purl Soho

Seed Stitch

The purl bumps in this stitch pattern are quite prominent, but there are little knit “V”‘s hiding above, below, to the left, and to the right of each purl! When measuring gauge in seed stitch, it is important to remember to count those knits whether you’re counting horizontal stitches or vertical rows. You might be tempted to count only the purl bumps, but don’t forget those “V”‘s! The stitch gauge in the example below is 10 stitches and 21 rows over four inches.

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In The Round

Let’s say your pattern is stockinette stitch in the round, which means you’ll only be knitting (not purling), and let’s say you tend to purl very tightly or loosely. This means that knitting a flat swatch (where every other row is purling) will not be a very accurate reenactment of you knitting your project. Luckily, there is a little trick to mimic circular knitting without having to knit a whole tube… Our Swatching For Circular Gauge Tutorial shows you how!  

Whew, You Did It!

Not so bad, right? You knit a little square of fabric, you blocked it, you measured it, you corrected it if necessary, and now you’re truly ready to go. The reward for this extra work is the serenity and confidence you will feel as you’re knitting, knowing that your project is going to fit and be beautiful!

All About Gauge | Purl Soho