How to Crochet a Granny Stripes Blanket
Few projects capture the heart of a crocheter quite like a granny stripes blanket. It has that perfect balance of simplicity and satisfaction — rows that work up quickly, a design that looks far more complex than it actually is, and an end result that feels genuinely heirloom. Whether you’re a beginner looking for your first “real” project or an experienced maker who wants something meditative to work on while watching television, the granny stripes blanket delivers every single time.
In this tutorial, I’m going to walk you through everything you need to know to make your own granny stripes blanket from start to finish. We’ll cover materials, tension tips, step-by-step stitch instructions, color change techniques, and finishing details. By the end, you’ll have all the knowledge you need to create a beautiful, cozy blanket that looks gorgeous draped over a sofa or gifted to someone you love.
What Is a Granny Stripes Blanket?
Before we dive in, let’s talk about what makes this stitch so special. The granny stripes pattern is inspired by the classic granny square, which has been a staple of crochet tradition for generations. Instead of working in the round to create a square, you work in rows to create long horizontal stripes of clustered double crochet stitches. The result is a textured, vintage-inspired fabric that has an almost woven appearance when completed.
The pattern is built around groups of three double crochets (sometimes called “shells” or “clusters”), separated by chain spaces — exactly like the corners and sides of a traditional granny square, just stretched out into a row. This means that if you already know how to make a granny square, this stitch will feel immediately familiar. And if you don’t, don’t worry at all — this tutorial assumes no prior knowledge of the granny square, and I’ll explain every step clearly.
Materials You’ll Need
Getting your materials right before you start makes the whole process smoother and more enjoyable. Here’s what you’ll need to gather:
Yarn: The granny stripes pattern works beautifully with almost any weight of yarn, but it’s most commonly made using DK weight (light/3) or Aran/Worsted weight (medium/4). DK gives you a lighter, more drapey blanket, while Aran or Worsted produces something thicker and cozier. For a throw-sized blanket, plan on approximately 1,000–1,500 meters of DK weight yarn or around 800–1,200 meters of Aran weight, depending on your finished size. Choose as many or as few colors as you like — this is one of those patterns where a rainbow of scraps looks just as stunning as a carefully curated two-color palette.
Crochet Hook: Use the hook size recommended on your yarn’s ball band as a starting point. For DK weight, that’s typically a 4mm or 4.5mm hook. For Aran/Worsted, a 5mm or 5.5mm hook is common. That said, always swatch first (more on that below) and adjust your hook size to match your desired tension.
Scissors: A sharp pair dedicated to your craft room will serve you well here, especially when it comes to cutting yarn cleanly between color changes.
Tapestry Needle or Yarn Needle: You’ll need this for weaving in ends at the end of the project — and with a multicolored granny stripes blanket, there will be ends to weave in. Embrace it as part of the process.
Stitch Markers (optional): These can be helpful for marking the beginning of a row or for keeping track of your stitch count if you’re working on a large blanket over multiple sessions.
Tension and Gauge
Tension (or gauge) is something many beginners are tempted to skip, but for a blanket it genuinely matters. A slight difference in tension across a large project can mean your blanket ends up a noticeably different size than intended, or that the fabric feels too stiff or too floppy.
To swatch, make a foundation chain of about 24 stitches and work the granny stripes pattern (which I’ll explain below) for around 10 rows. Fasten off, block your swatch lightly with steam or water, and then measure it. This gives you a baseline so you can calculate how many foundation chains you’ll need for your desired width.
For a standard Aran weight blanket on a 5mm hook, you can expect roughly 14–16 stitches and 8–10 rows to measure 10cm x 10cm, though this varies a lot between individual crocheters. The most important thing is that your fabric feels soft and flexible — not stiff and boardlike, and not so loose that it looks gappy and unstructured.
Foundation Chain and Sizing
The granny stripes pattern requires a foundation chain that follows a specific multiple, which allows your clusters to line up correctly across every row.
For this pattern, you need a multiple of 3 stitches, plus 4 extra for the foundation. This means your chain total should be: (3 × number of clusters per row) + 4.
As a practical guide, here are some common finished blanket widths and the chain counts to achieve them (using Aran weight on a 5mm hook, adjust for your own tension):
A baby blanket around 60cm wide typically uses a foundation chain of about 67. A lap blanket around 90cm wide needs approximately 100 stitches in the chain. A generous throw around 120cm wide uses roughly 130–133 stitches. A large double-bed blanket around 150cm wide will need approximately 163–166 stitches.
These are starting points — your tension will determine your actual measurements, which is why swatching first is so valuable.
Step-by-Step Pattern Instructions
Now for the heart of the tutorial. I’ll write this for a right-handed crocheter using UK crochet terminology. If you’re using US terminology, note that what I call a “double crochet” (UK) is a “single crochet” in US terms, and what I call a “treble crochet” (UK) is a “double crochet” in US terms. This pattern uses treble crochets grouped in threes (UK terminology).
Abbreviations used:
ch = chain
sl st = slip stitch
tr = treble crochet (UK) / double crochet (US)
sp = space
rep = repeat
rs = right side
The Foundation Row
Make your foundation chain to the desired length (remember: multiple of 3, plus 4).
Row 1 (Foundation Row, RS): Skip the first 4 chains from your hook (this counts as your first cluster space). Work 3 tr into the 5th chain from your hook. Skip 2 chains, work 3 tr into the next chain. Repeat from to all the way to the last chain. Work 1 tr into the very last chain. Turn your work.
You should now see a row of 3-tr clusters sitting neatly along the foundation chain, with a single treble at each end.
Row 2 Onwards — The Granny Stripes Pattern
This is the row you’ll repeat for the entire blanket. It creates the signature clustered stripe.
Row 2: Chain 3 (this counts as your first treble crochet). Turn your work so the right side faces away from you. Work 3 tr into the space between the next cluster and the one before it (i.e., into the gap between clusters). Repeat from * across the row. Work 1 tr into the top of the turning chain from the previous row. Turn.
That’s it. Repeat Row 2 for every subsequent row of the blanket.
The key to understanding this row is where you place your hook. You are not working into individual stitches — you are working into the spaces between the clusters. Each group of 3 tr lands in the gap between the groups on the previous row. This is what gives the pattern its connected, textured look.
At the end of each row, you should always have the same number of clusters as you had at the end of Row 1, plus a single treble at each edge. Count your clusters regularly, especially as a beginner, to make sure you haven’t accidentally gained or lost one somewhere along the way.
Changing Colors
One of the greatest joys of the granny stripes blanket is building up a palette of colors that feels personal to you. Changing color is simple and, once you’ve done it a couple of times, becomes second nature.
To change color at the end of a row, work your last treble crochet until you have two loops remaining on your hook, then drop your current yarn and pull through the new color to complete the stitch. Fasten off the old color, leaving a tail of about 15cm for weaving in later, and continue with the new color from the next row.
Some people prefer to carry their yarn up the side of the blanket rather than fasten it off between every color change, especially if they’re alternating between two or three colors repeatedly. To do this, simply lay the unused yarn alongside the edge and crochet over it as you work back. This technique reduces the number of ends you need to weave in at the end, though it can look a bit untidy on the edge if you’re not careful — so experiment and see which approach suits you.
A few color-planning tips that make a real difference: write down your color sequence before you begin, even loosely. Decide whether you want your stripes to be equal width (same number of rows in each color) or varying widths for a more eclectic feel. Consider starting and ending with a neutral — cream, beige, grey, or white — to give the blanket a grounded, cohesive look even if the middle is a riot of bright hues. And don’t be afraid to repeat colors throughout — a color appearing three or four times throughout a blanket creates visual rhythm and makes the whole thing feel intentional rather than random.
Border Options
A border is optional but highly recommended, especially for a blanket that will be gifted or used regularly. A good border tidies up the edges, evens out any slight inconsistencies in tension at the sides, and gives the whole piece a polished, finished look.
Simple Double Crochet Border: Work a round of double crochet (UK) / single crochet (US) all the way around the blanket, placing one stitch into each row end along the sides and one stitch into each stitch along the top and bottom. Work 3 stitches into each corner to keep the corners lying flat. Join with a slip stitch, fasten off, and weave in your ends.
Shell Border: For something a little more decorative, work a row of shells — groups of 5 or 7 treble crochets worked into the same stitch — spaced evenly around the edge. This creates a lovely scalloped effect that pairs beautifully with the cluster texture of the blanket body.
Granny Stripe Border: Some makers prefer to add one or two more rows of the granny stripe pattern itself along the top and bottom edges, turning the work and treating those edges exactly like the body of the blanket. This creates a seamless, unified look.
Choose whichever border feels right for your blanket and your personal aesthetic. There’s no wrong answer here.
Weaving in Ends
Once your border is done, it’s time for the part that every crocheter has a complicated relationship with: weaving in ends. For a multicolored blanket, this can feel like a significant task, but there are a few ways to make it more manageable.
First, keep your tails long — at least 15cm — so you have enough yarn to work with. Thread your tapestry needle and weave the tail through the stitches on the wrong side of the blanket, changing direction a couple of times to secure it firmly. Avoid weaving in a straight line, as this can work loose over time with washing and use. Give each tail a gentle tug once woven to make sure it’s secure, then trim the excess close to the fabric.
Some makers prefer to weave in ends as they go, doing a few tails after each color change rather than saving them all for the end. This approach makes the final finishing session much less daunting, and is a habit well worth developing.
Blocking Your Blanket
Blocking is the process of wetting or steaming your finished blanket and then laying it flat to dry in the correct shape. It makes an enormous difference to the finished appearance — stitches even out, the fabric softens and relaxes, and the overall dimensions of the blanket settle.
For most acrylic yarns, steam blocking is effective. Lay your blanket on a flat surface (a bed works well), cover it with a damp cloth, and hold a steam iron just above the surface without pressing directly onto the crochet. The steam will relax the fibers gently. For natural fibers like cotton or wool, wet blocking — soaking the blanket in cool water, gently squeezing out the excess (never wring), and laying it flat to dry — tends to give better results.
Either way, resist the temptation to fold or use your blanket before it’s fully dry. Blocking while slightly damp and then letting it dry completely gives the best results.
Tips for a Beautiful Finished Blanket
A few final thoughts that will make a real difference to your finished piece:
Keep consistent tension throughout, particularly at the beginning and end of each row. This is where tension inconsistencies tend to cluster, so slow down slightly and be intentional at those points.
Check your stitch count regularly, at least every five or ten rows. Catching a missed or accidental extra cluster early is far less painful than discovering it twenty rows later.
Use good quality yarn. This doesn’t have to mean expensive yarn — there are wonderful affordable options in every weight category — but a yarn with good stitch definition will show off the cluster pattern beautifully, while a very fluffy or textured yarn can obscure it.
Take photos as you go. Not just because they’re lovely to look back on, but because they help you remember decisions you made about color sequences, hook size changes, or design choices.
Work at your own pace. There is absolutely no urgency with a blanket. Some people make a granny stripes blanket in a week; others take a leisurely six months, adding a few rows whenever the mood strikes. Both approaches are completely valid, and the blanket will be equally beautiful at the end.
Final Thoughts
The granny stripes blanket is one of those projects that earns its place in the canon of classic crochet for very good reason. It’s rhythmic and satisfying to make, endlessly customizable in color and size, and genuinely useful once finished. Every time I pick up a project like this one, I’m reminded of why I fell in love with crochet in the first place — the way a simple repeated motion, worked patiently over time, creates something tangible and lasting.
I hope this tutorial gives you everything you need to get started on your own granny stripes blanket. If you make one, I’d love to see it — share your progress and finished photos over on the CJ Design Blog community, and don’t hesitate to leave a comment below if you have any questions along the way. Happy crocheting!
