Patchwork Blanket Knitting Pattern, FREE: Baby, Throw, and Twin Sizes

There is something deeply satisfying about a patchwork blanket. Whether you are looking for a manageable beginner project, a way to use up your yarn stash, or a heartfelt handmade gift, a knitted patchwork blanket checks every single box. This free pattern walks you through three sizes — baby, throw, and twin — using the same basic square construction, so you can start small and scale up with confidence.

Let’s dive in.

Why Knit a Patchwork Blanket?

Before we get to the pattern itself, it is worth talking about why this particular style of blanket has stood the test of time. Patchwork knitting is modular, which means you knit individual squares (or other shapes) and join them together at the end. This approach has several advantages that make it beloved by knitters of all skill levels.

First, the squares are portable. You can tuck one or two into your bag and work on them during a commute, a waiting room visit, or a quiet evening on the couch. There is no awkward large-blanket bulk to wrestle with until the very end.

Second, patchwork blankets are incredibly forgiving with yarn. Because each square is its own small project, you can use up partial skeins, mix weights (within reason), and experiment with colors without committing your entire yarn stash to a single, rigid plan. Many knitters use patchwork blankets as living scrapbooks — each square representing a different project, a different year, a different mood.

Third, the construction itself is beginner-friendly. Most patchwork squares rely on basic knit and purl combinations, which means that if you can knit a dishcloth, you can knit a patchwork blanket. The finished product looks far more complex than the skill required to make it.

Finally, patchwork blankets make extraordinary gifts. A baby blanket in soft pastels, a throw in earthy tones for a friend’s new apartment, a twin-sized blanket for a teenager heading off to college — each one is personal, practical, and made with real care.

Materials You Will Need

The beauty of this pattern is its flexibility. Here is what you will need for each size, followed by a general materials list.

Yarn: This pattern is written for worsted weight yarn (also labeled as Category 4 or “medium” weight). Any worsted weight yarn will work, and this is a wonderful pattern for stash-busting. You will need approximately:

For the baby blanket (finished size approximately 30 x 36 inches): 400–500 yards total across all colors.

For the throw blanket (finished size approximately 50 x 60 inches): 1,200–1,500 yards total.

For the twin blanket (finished size approximately 60 x 80 inches): 2,000–2,500 yards total.

If you prefer a chunkier, cozy result, you can substitute bulky weight yarn (Category 5 or 6) and adjust your needle size accordingly. The squares will simply come out larger, so you will need fewer of them.

Needles: US size 7 (4.5mm) straight or circular needles for worsted weight. Use US size 9 (5.5mm) for bulky weight. Circular needles are recommended for the border, even if you prefer straight needles for the squares themselves.

Other supplies: Yarn needle for weaving in ends and seaming squares, scissors, blocking mats and pins (highly recommended — blocking transforms hand-knitted squares), stitch markers (optional but helpful).

Gauge: Approximately 18 stitches and 24 rows = 4 inches in stockinette stitch on US 7 needles with worsted weight yarn. Each finished square should measure approximately 6 x 6 inches after blocking. Gauge is important here because it determines your finished blanket size. If your squares are coming out larger or smaller, adjust your needle size accordingly.

Understanding the Pattern Structure

Each blanket is made up of 6-inch squares arranged in a grid. Here is the square count for each size:

The baby blanket uses a 5 x 6 grid for a total of 30 squares.

The throw blanket uses an 8 x 10 grid for a total of 80 squares.

The twin blanket uses a 10 x 13 grid for a total of 130 squares.

Each square in this pattern uses one of five simple stitch patterns: garter stitch, seed stitch, basketweave, moss stitch, and a simple 2×2 rib. These five textures play beautifully together and create a finished blanket with wonderful visual and tactile variety. You can repeat squares as often as you like, use only one or two stitch patterns throughout, or mix all five freely. There is no wrong approach.

The Five Square Patterns

Square 1: Garter Stitch Square

Cast on 28 stitches.

Knit every row until the square measures 6 inches from the cast-on edge. Bind off loosely.

Garter stitch is the most beginner-friendly of the five textures. It lies perfectly flat without any tendency to curl, which makes it ideal for blanket construction. It also creates a lovely, slightly squishy fabric that is soft against skin.

Square 2: Seed Stitch Square

Cast on 28 stitches. Make sure you have an even number of stitches.

Row 1: (K1, P1) repeat to end.
Row 2: (P1, K1) repeat to end.

Repeat rows 1 and 2 until the square measures 6 inches. Bind off in pattern.

Seed stitch creates a bumpy, textured fabric that is particularly beautiful in solid or semi-solid colorways. It also lies flat naturally, which is another advantage for blanket work.

Square 3: Basketweave Square

Cast on 28 stitches.

Rows 1–4: (K4, P4) repeat to end of row, ending K4.
Rows 5–8: (P4, K4) repeat to end of row, ending P4.

Repeat these 8 rows until the square measures 6 inches. Bind off in pattern.

Basketweave is a visually striking pattern that looks complex but follows a very simple logic once you get the rhythm. The alternating blocks of knit and purl create a woven appearance that is especially beautiful in heathered or tweed yarns.

Square 4: Moss Stitch Square

Cast on 28 stitches. Make sure you have an even number of stitches.

Row 1: (K1, P1) repeat to end.
Row 2: (K1, P1) repeat to end.
Row 3: (P1, K1) repeat to end.
Row 4: (P1, K1) repeat to end.

Repeat rows 1–4 until the square measures 6 inches. Bind off in pattern.

Moss stitch is often confused with seed stitch, but it has a slightly different texture — the vertical columns of knit and purl are two rows tall instead of one, which creates a fabric that looks almost like tiny bricks. It is slightly denser than seed stitch and is wonderfully warm.

Square 5: 2×2 Rib Square

Cast on 28 stitches. Make sure your stitch count is a multiple of 4.

Every row: (K2, P2) repeat to end.

Continue until the square measures 6 inches. Bind off in pattern.

Note: Ribbing naturally wants to pull in horizontally. For a blanket, you want your squares to be a consistent size, so be sure to bind off very loosely or use a larger needle for the bind-off row. Blocking will also help even out ribbed squares. If you find that your ribbed squares are coming out significantly narrower than the others, cast on 32 stitches instead of 28.

Color Planning

Color is where a patchwork blanket becomes truly personal. Here are a few approaches to consider before you begin knitting.

A monochromatic palette uses different shades of a single color — pale blue through deep navy, for example, or cream through caramel. This creates a sophisticated, cohesive finished blanket that works in almost any room or nursery.

A complementary palette uses two colors that sit opposite each other on the color wheel, such as rust and teal, or golden yellow and deep purple. The contrast is bold and modern.

A scrappy rainbow approach uses as many colors as you like, distributed across the blanket in a way that feels balanced without being rigid. This is the most forgiving approach for stash-busting and often produces the most joyful results.

A gradient or ombre layout organizes your squares so that the blanket transitions gradually from one color to another — light on one end, dark on the other, for example. This requires a bit more planning upfront but creates a stunning visual effect.

However you approach color, it helps to lay your finished squares out on a flat surface before seaming and step back to look at the overall arrangement. This is your chance to move things around, balance the colors, and make sure you are happy with the layout before committing.

Assembling the Blanket

Once all your squares are knitted and blocked, it is time to seam them together. There are several methods for joining knitted squares, and each has its advantages.

The mattress stitch is an invisible seam worked from the right side of the fabric. It creates a nearly seamless join and is the most professional-looking option. It does take a bit of time to master, but there are excellent video tutorials available online if written instructions feel confusing.

The whipstitch is faster and simpler than the mattress stitch. Worked from the wrong side with the squares held together, it creates a small visible ridge on the wrong side of the blanket, which is perfectly acceptable for most projects.

The three-needle bind-off is a technique worked on live stitches (meaning you do not bind off your squares before joining). If you are comfortable with this method, it creates an especially clean join. However, it requires a bit more planning because you must keep your stitches live rather than binding off as you complete each square.

The crochet slip stitch join uses a crochet hook to join squares with a slip stitch along their edges. You do not need to be a crocheter to do this — it is a single, repetitive motion — and it creates a flat, tidy seam with a decorative raised line on the right side that many knitters love.

For the seaming order, work in rows first. Join your squares horizontally into rows, then join the rows together vertically. This is easier to manage than trying to seam individual squares in a grid pattern.

Adding the Border

A border is optional but recommended. It finishes the edges cleanly, prevents any curling at the corners, and gives the blanket a polished, intentional look.

Pick up and knit stitches around the entire perimeter of the assembled blanket using circular needles. The general rule is to pick up approximately 3 stitches for every 4 rows along the vertical edges, and 1 stitch for every stitch along the horizontal cast-on and bind-off edges. Pick up 3 stitches in each corner stitch to allow the border to turn neatly.

Work 10–12 rows of garter stitch (knitting every row) or seed stitch all the way around, then bind off loosely. This creates a tidy, flat border that complements any of the five square textures beautifully.

Blocking Your Blanket

Blocking is the step that many beginners skip and experienced knitters will never skip. It is the process of wetting or steaming your finished fabric and then pinning or shaping it to its final dimensions while it dries.

For a patchwork blanket, blocking individual squares before seaming is highly recommended. Wet each square lightly, gently squeeze out the excess water (never wring), lay it flat on a blocking mat, and pin it to a 6 x 6 inch square. Let it dry completely — ideally overnight. This step ensures that all your squares are the same size, which makes seaming dramatically easier and produces a much more even finished blanket.

You can block the finished blanket as well, though this is more of a final touch than a necessity if you have already blocked the squares.

Tips for Success

Weave in your ends as you go. There is nothing more discouraging than finishing 80 squares and realizing you have 160 ends waiting for you. Taking two minutes to weave in the ends of each square immediately after finishing it keeps the project enjoyable from start to finish.

Keep a simple log. Jot down how many squares you have completed in each stitch pattern and color combination. This is especially useful for larger sizes where it can be easy to lose track of your progress.

Do not stress about perfection. Handknit fabric has natural variation, and patchwork construction is incredibly forgiving of small inconsistencies in tension or sizing. Blocking handles most of these differences beautifully.

Use a yarn needle, not a tapestry needle, for seaming. The blunter tip of a yarn needle slides between stitches more easily and is less likely to split your yarn.

Consider knitting a few extra squares. Having a handful of additional squares gives you flexibility when arranging your layout and is a good safeguard in case you make an error and need to replace a square.

Project Ideas and Variations

This pattern is extremely adaptable. Here are a few variations worth considering.

For a baby blanket, a soft merino wool or a machine-washable superwash yarn is ideal. Parents of babies will deeply appreciate the ability to throw the blanket in the washing machine. Choose colors that work for any gender, or go bold and bright for a playful nursery aesthetic.

For a throw, consider using a linen-cotton blend for a cool-weather-appropriate blanket that drapes beautifully on a couch or chair. The natural fiber gives the finished blanket an elegant, heirloom quality.

For a twin blanket, bulky weight yarn will save you significant time. The squares come out around 9 inches each with bulky yarn and US 10 needles, which means fewer squares to knit and a wonderfully cozy, chunky final product.

You can also introduce a sixth square pattern — simple stockinette — if you want even more texture variety. Note that stockinette squares will curl at the edges until blocked and seamed, so be sure to block them thoroughly before joining.

A Note on Yarn Yardage and Shopping

If you are buying yarn specifically for this project rather than stash-busting, here is a simple way to plan your purchase. Decide on your palette — say, four colors — and divide the total yardage roughly evenly among them. For a throw blanket requiring 1,200–1,500 yards, that means approximately 300–375 yards per color. Most worsted weight skeins contain 200–220 yards, so two skeins per color should be more than sufficient with a comfortable margin for error.

Always buy a little more yarn than you think you need, especially if you are working with dye lots. Nothing is more frustrating than running out of a specific color with three squares left to go and finding that the new skein is a slightly different shade.

Final Thoughts

A patchwork blanket is one of those projects that rewards patience and accumulation. You might knit one square on a Tuesday evening and two more over the weekend, and before long you have a stack of beautiful, colorful squares waiting to be transformed into something larger. There is a particular joy in that transformation — in laying all your squares out on the floor and seeing the blanket take shape before a single seam has been sewn.

Whether you choose the baby size as your first foray into blanket knitting, tackle the throw as a cozy winter project, or commit to a twin for someone special in your life, this pattern is designed to be as enjoyable to knit as it is to give or receive. Happy knitting.