A square is the easiest shape to knit, and garter stitch is the simplest way to make one

A garter stitch square is made by knitting every row in the same direction, which creates a bumpy texture on both sides. The square grows at the same rate horizontally and vertically, so if you cast on 30 stitches and knit 30 rows, you get a roughly even square. You do not need to increase or decrease stitches—just cast on, knit every row until the piece is as long as it is wide, then bind off. This is why beginners start here: there is only one stitch to learn, and the shape takes care of itself.

The time it takes depends on your yarn weight and needle size. A small square in worsted-weight yarn on size 8 needles takes about 30 minutes to an hour. A larger square takes longer, but the method never changes.

Key Takeaways

  • Cast on a number of stitches equal to the number of rows you plan to knit—for example, 30 stitches for a 30-row square.
  • Knit every stitch in every row using the basic knit stitch; do not purl or change stitches.
  • Count your rows as you go so you know when the piece is square-shaped.
  • Bind off all stitches when you reach the target row count, then weave in the loose ends.

Cast on the right number of stitches

The number of stitches you cast on determines the width of your square. The number of rows you knit determines the height. To make a true square, these two numbers should be equal—or very close, because knit stitches are taller than they are wide.

If you want a 4-inch square in worsted-weight yarn on size 8 needles, cast on about 12 stitches. Knit 16 rows, and you will have a square. (The extra rows account for the fact that stitches are taller than wide.) If you are using a different yarn weight or needle size, knit a small test swatch first: cast on 10 stitches, knit 10 rows, measure it, and do the math. A 10-stitch, 10-row swatch in bulky yarn might measure 3 inches by 2.5 inches, which tells you that you need more rows than stitches to get a square.

Use the long-tail cast-on or any cast-on method you know. The long-tail cast-on is common because it creates a neat edge, but for a practice square, any method works.

Knit every stitch in every row

Once you have cast on, insert your needle through the first stitch from left to right, wrap the yarn around the needle, and pull the new loop through. That is one knit stitch. Repeat this motion for every stitch on your needle until you reach the end of the row.

Turn the needle around and knit the next row the same way. Do not purl, do not change stitches, and do not skip stitches. Garter stitch is just knit, knit, knit, row after row. This repetition is what makes it meditative and what makes it impossible to mess up—if you drop a stitch, you can pick it back up, and if you accidentally purl a row, the square still looks fine.

Keep the tension consistent as you work. This means pulling the yarn snug enough that stitches do not fall off the needle, but not so tight that your hands hurt or the fabric bunches. Most beginners pull too tight at first; this is normal and loosens up with practice.

Count your rows to know when to stop

Mark your target row count on a piece of paper or use a row counter—a small device that clips to your needle and lets you click off each row. Without a counter, you can lose track easily, especially if you set the work down for a few days.

If you lose count partway through, count the bumps on the side of your work. Each bump is one row. Garter stitch makes this straightforward because the bumps are very visible. If you have knit 20 rows and want 30, you have 10 rows left to go.

As you approach your target row count, measure the piece. Lay it flat on a table and measure from the cast-on edge to the needle. When the height matches the width, you are done—or very close. Knit one or two more rows if needed to make it perfectly square.

Bind off to finish the edges

Binding off secures the stitches so they do not unravel when you remove the needle. Knit the first stitch normally. Knit the second stitch. Now use your left needle to lift the first stitch over the second stitch and off the needle. You now have one stitch on the right needle. Knit another stitch, lift the previous stitch over it, and repeat until one stitch remains.

Pull the yarn through the final stitch and pull tight. Cut the yarn, leaving a 4-inch tail, and pull the tail through the loop. The square is now bound off and will not unravel.

Weave in the loose ends

You have two loose ends: the tail from the cast-on and the tail from the bind-off. Thread each one onto a yarn needle (a blunt needle with a large eye) and weave it through the bumps on the edge of the square for about 2 inches. This hides the tail inside the fabric so it does not show. Trim any excess yarn.

Your square is now finished. It is ready to use as a dishcloth, a coaster, a patch, or a building block for a larger project like a blanket made of many squares sewn together.

Frequently Asked Questions

Why does my square look more like a rectangle?

Knit stitches are taller than they are wide, so equal numbers of stitches and rows create a rectangle. If you cast on 20 stitches and knit 20 rows, you will get a shape that is wider than it is tall. Measure your test swatch and adjust: if a 10-stitch, 10-row swatch is 3 inches wide and 2.5 inches tall, you need about 12 rows for every 10 stitches to get a square.

What if I drop a stitch?

A dropped stitch looks like a hole or a ladder running down the side of your work. Stop knitting, pick up the dropped stitch with a crochet hook, and pull the loose yarn through it to find it. If you do not have a crochet hook, a safety pin will hold the stitch in place until you can fix it later. Garter stitch is forgiving—a dropped stitch and fixed stitch will barely show.

Can I use any yarn and needle size?

Yes. Thicker yarn and larger needles knit faster and create a larger square with fewer stitches. Thinner yarn and smaller needles take longer but let you make a smaller, tighter square. The method is always the same: cast on, knit every row, bind off. The only difference is how many stitches and rows you need to reach your target size.

Do I have to use garter stitch?

No. You can make a square with stockinette stitch (knit one row, purl one row, repeat), seed stitch, or any other stitch pattern. Garter stitch is the easiest because it uses only one stitch and looks the same on both sides, so there is no "wrong" side to hide.