Mitred Squares Blanket Pattern: A Complete Guide to This Timeless Knitting Technique

There is something deeply satisfying about a mitred square blanket. Whether you are a seasoned knitter looking for a new modular project or a curious beginner who has just discovered the concept, the mitred square method offers one of the most versatile, portable, and endlessly customizable knitting experiences you will ever encounter. In this guide, you will find everything you need to know to cast on your first mitred square, join them into a stunning blanket, and make confident decisions about yarn, color, and construction along the way.

What Is a Mitred Square in Knitting?

A mitred square, sometimes spelled “mitered square,” is a small knitted square constructed using short rows or decreases worked from the outside edges toward a central diagonal. Rather than knitting a flat square from bottom to top, you cast on along two sides of the square simultaneously and decrease steadily toward a corner, creating a distinctive diagonal line running from one corner to the opposite. This line is often called the mitre, and it gives the technique its name.

The result is a tidy, self-contained module with four corners and a satisfying geometric structure. When you join multiple mitred squares together, the diagonal lines of each square combine to create a rhythmic, quilt-like pattern across the entire blanket. It is part knitting, part geometry, and entirely addictive.

Mitred squares have been a beloved technique in Scandinavian and European knitting traditions for generations. The method was popularized in the English-speaking world in large part by Vivian Høxbro, whose book Domino Knitting introduced many knitters to the concept of building large, modular fabric from small interlocking units.

Why Knit a Mitred Squares Blanket?

Before diving into the pattern itself, it is worth asking what makes this style of blanket so appealing to so many different kinds of knitters.

The most obvious benefit is portability. Because each square is a small, self-contained unit, you can tuck your project into a bag and work on it anywhere. There is no unwieldy mass of fabric draped across your lap. There is no counting across hundreds of stitches. Each square takes care of itself.

Another major advantage is yarn management. Mitred square blankets are ideal for using up scraps and leftovers from other projects. Since each square requires only a small amount of yarn, you can rotate through colors freely, using up those odd balls that have been sitting in your stash for years. Many knitters plan their color sequences in advance, but others simply grab whatever is on hand, and the randomness of that approach tends to produce beautiful, organic-looking results.

There is also the question of mistakes. If you drop a stitch badly in the middle of a large knitted blanket, the consequences can feel catastrophic. But if you make an error on a mitred square, you have only a small piece to frog and reknit. The modular nature of the project keeps individual setbacks small and manageable.

Finally, mitred squares blankets are wonderfully scalable. Want a small lap blanket? Knit a five-by-five grid of squares. Want a generous throw for a queen-sized bed? Extend the grid. The pattern stays exactly the same; you simply decide how many squares to make.

Materials You Will Need

Getting started with a mitred squares blanket does not require any specialized tools or expensive supplies. Here is what to gather before you cast on.

Yarn: Almost any yarn weight can be used to make mitred squares, from fingering to bulky. The most popular choices for blankets tend to be DK or worsted weight yarn, as these produce squares that are satisfying to knit without being too bulky or too time-consuming. When choosing yarn, look for something with good stitch definition so the diagonal decrease line shows clearly. Wool and wool blends are particularly lovely for this project because they have natural elasticity and the finished blanket will have a pleasing drape. If the blanket is intended for a baby or someone with sensitive skin, choose a soft superwash wool or a cotton blend.

Needles: Use the needle size recommended on your yarn’s ball band as a starting point, then adjust based on your gauge swatch. Many knitters find they go down a needle size or half-size from the recommended gauge when knitting mitred squares, as the dense decrease structure can sometimes make the fabric feel stiff. Circular needles are recommended even for small squares, as the cable gives you flexibility as stitch counts change.

Scissors and Tapestry Needle: You will be weaving in many ends as you go, so keep these within reach at all times. Weaving in ends as you complete each square is far less overwhelming than facing a blanket-sized pile of them at the end.

Stitch Markers: Optional but helpful, especially when you are first learning the technique. A stitch marker placed on either side of the central decrease stitch makes it easy to spot where to work your decreases without having to count every time.

Gauge and Square Size

Before committing to a full blanket, swatch. The size of your finished square will depend on your yarn weight, your needle size, and your personal tension. A typical worsted weight mitred square worked on 4.5mm needles might measure roughly 4 to 5 inches per side when blocked, but this can vary significantly.

Once you know the finished size of your individual square, you can calculate how many squares you need to achieve your target blanket dimensions. For example, if your squares measure 4 inches each and you want a blanket that is 48 inches wide, you will need 12 squares across. If you want the blanket to be 60 inches long, you will need 15 squares in each column, for a total of 180 squares. This sounds like a lot, but each square works up quickly, and the sense of progress as your collection grows is genuinely motivating.

The Basic Mitred Square Pattern

The following pattern produces a single mitred square using the most common method. Once you have made one, you will find the rhythm becomes completely intuitive.

Abbreviations used:

k2tog — knit two stitches together (right-leaning decrease)
ssk — slip, slip, knit (left-leaning decrease)
sl1 — slip one stitch purlwise with yarn in back
pm — place marker
sm — slip marker

Cast On

Using your chosen yarn, cast on an odd number of stitches. The exact number depends on the size of square you want. For a medium square, cast on 41 stitches. For a larger square, cast on 61. For a smaller practice square, cast on 21.

The cast-on number is always odd so that there is a single center stitch after the two halves of your cast-on are divided.

Setup Row (Wrong Side): Knit to the center stitch, place marker, knit the center stitch, place marker, knit to the end.

Row 1 (Right Side): Knit to 1 stitch before the first marker, ssk, slip marker, k1 (center stitch), slip marker, k2tog, knit to end.

Row 2 (Wrong Side): Knit across all stitches.

Repeat Rows 1 and 2, removing markers when they become inconvenient as the stitch count decreases. Continue until 3 stitches remain. Work a centered double decrease (slip 2 together knitwise, k1, pass slipped stitches over) or k3tog to close. Break yarn and pull through the final stitch.

This gives you a square with a neat diagonal decrease line running from one corner to the opposite, with the fabric lying flat and tidy.

Joining Squares as You Go

One of the great pleasures of mitred square blankets is that you do not have to sew individual squares together at the end. Instead, you pick up stitches along the edge of a finished square and knit the next square directly onto it. This joining-as-you-go method is one of the reasons the technique feels so satisfying and self-contained.

Once your first square is complete, pick up and knit stitches along one edge of it. The number of stitches you pick up from the existing square should match half your total cast-on count minus one, and you cast on the remaining stitches fresh. For example, if you are working with a 41-stitch square, you pick up 20 stitches along the edge of the first square and cast on 21 new stitches to complete your total of 41.

Work the second square exactly as the first. When it is complete, you have two joined squares with a clean, invisible seam between them. Continue in this way, always picking up from existing edges when available and casting on fresh stitches along open edges, building your blanket row by row or in whatever configuration you choose.

Different knitters prefer different construction orders. Some build the blanket in diagonal strips, working from one corner outward. Others prefer to build row by row, completing an entire horizontal row of squares before starting the next. Both methods work beautifully, and the choice often comes down to whether you find it more motivating to see the blanket grow sideways or upward.

Color Work and Design Ideas

This is where the mitred squares blanket truly comes alive. Because each square is independent and requires only a small amount of yarn, the color possibilities are nearly unlimited.

Scrappy rainbow blanket: Use every color in your stash. Don’t plan. Just grab a ball and go. The randomness will create something that looks deliberately eclectic and full of personality.

Gradient progression: Arrange your colors in a deliberate sequence from light to dark, or from one hue to another. Worked across a large blanket, a gradient arrangement can look breathtaking.

Two-color checkerboard: Alternate between two colors in a simple checkerboard pattern. This is classic, graphic, and timeless.

Striped squares: Rather than making each square a single solid color, work stripes within individual squares. Because you are working back and forth, you can easily carry two yarns up the side and alternate every two rows.

Tonal neutrals: If you prefer a quieter aesthetic, choose several shades of the same neutral color family, soft whites, creams, grays, and warm beiges, and arrange them in a subtle, textured composition.

The diagonal decrease line that runs through each square also becomes a design element in its own right. When you place squares next to one another with their diagonals running in the same direction, you get a sense of movement and flow across the blanket. When you alternate the orientation of the diagonals, you get a more fragmented, textural effect. Experimenting with square orientation opens up a whole additional layer of design possibility without changing the construction at all.

Adding a Border

Once your grid of squares is complete, consider adding a border to finish the edges. A simple garter stitch border works beautifully with the texture of mitred squares. Pick up stitches around the entire perimeter of the blanket and work back and forth in garter stitch for as many rows as you like, mitering the corners as you go to keep the border lying flat.

To miter a corner in a garter stitch border, place a marker at each corner stitch and increase one stitch on either side of the marker on every right-side row. This fans the border outward gently, preventing puckering and keeping the blanket square and flat.

You can also work a simple seed stitch or ribbed border, or keep things minimal and simply block the edges without any additional border at all. If your squares are well-blocked and your pick-up edges are tidy, the raw edges of the blanket can look perfectly clean and intentional on their own.

Blocking Your Mitred Squares Blanket

Blocking makes an enormous difference to the final appearance of a mitred squares blanket. Individual squares can look slightly uneven or puckered before blocking, but after a good soak and a careful pinning, everything evens out into a beautifully regular, geometric fabric.

To block the finished blanket, soak it in cool to lukewarm water for at least 20 minutes, allowing the fibers to fully absorb the water. Gently squeeze out excess water without wringing, then roll the blanket in a clean towel to remove more moisture. Lay it flat on blocking mats or a clean carpet and pin it to shape, stretching each edge to your target dimensions and making sure the squares are aligned. Allow it to dry completely before removing the pins. This can take 24 to 48 hours depending on the yarn content and the thickness of the fabric.

If you are working with superwash wool, be particularly careful with blocking, as superwash-treated fibers can grow substantially when wet. Cotton and linen yarns tend to remain more stable.

Tips for Success

A few practical notes that will make your mitred squares blanket experience smoother and more enjoyable.

Weave in your ends as you go. Every square produces at least two yarn tails, and more if you are working stripes or changing colors. If you wait until the blanket is finished to weave them in, you will be facing a daunting task. Take five minutes at the end of each square to weave in the tails, and the finishing process at the end will be almost nothing.

Keep a consistent tension when picking up stitches along existing edges. Uneven pick-up tension is one of the most common causes of gaps or puckers between squares. Try to pick up one stitch for every two rows along garter stitch edges, or adjust slightly based on what gives the neatest result with your particular yarn and needle combination.

Label your yarn as you go if you are working with many different colors. It can be surprisingly easy to lose track of a color name or dye lot partway through a large project, and you may want to order more of a particular yarn later.

Consider working a small test strip of two or three joined squares before committing to the full blanket. This lets you practice the joining technique, confirm your square size, and check that you are happy with your color choices, all before you are very far in.

A Project Worth Your Time

The mitred squares blanket is one of those knitting projects that rewards you long after the last square is bound off. It teaches you about modular construction, color theory, and the meditative pleasure of repeating a simple shape until something large and beautiful emerges. It is the kind of project that experienced knitters return to again and again because the formula stays the same while the creative possibilities remain endless.

Whether you work through it in a single focused season or pick it up and put it down over several years, adding squares whenever you have a spare hour and a leftover ball of yarn, the mitred squares blanket will become one of the most personal and satisfying pieces in your knitting life. There are very few projects where the journey is as enjoyable as the destination, but this is absolutely one of them. Cast on, find your rhythm, and enjoy every square.