Granny Square Tie Front Cardigan Pattern | Crochet Sweater

There is something deeply satisfying about transforming a pile of colorful yarn into a garment you can actually wear. The granny square has been a cornerstone of crochet for generations, beloved for its versatility, its portability, and the way it lets you work in small, manageable pieces before assembling them into something beautiful. This granny square tie front cardigan takes that beloved motif and elevates it into a wearable, stylish sweater that feels both nostalgic and completely modern. Whether you are new to garment crochet or a seasoned maker looking for your next project, this pattern is designed to guide you through every step.

What Makes This Cardigan Special

The tie front detail is what sets this cardigan apart from a standard granny square vest or jacket. Instead of buttons or a zipper, the two front panels simply tie at the center, creating a soft, adjustable closure that drapes beautifully and flatters a wide range of body types. You can tie it snugly at the waist for a more fitted silhouette, let it hang open for a relaxed boho look, or tie it loosely for something in between. The granny square construction means the cardigan has built-in texture and visual interest without you having to do anything extra. The squares do all the work.

Because granny squares are worked separately and then joined, this project is also incredibly forgiving. If you make a square that turns out slightly off, you can replace it without frogging the entire piece. If you want to change your color scheme halfway through, you can. The modular nature of the construction gives you creative control at every stage.

Materials You Will Need

Before you dive in, gather everything you need so your project flows without interruption.

Yarn: Choose a medium weight yarn, labeled as size 4 or worsted weight. You will need approximately 1,200 to 1,800 yards depending on your size, with the lower end working for a small and the higher end for an extra large. A yarn with some drape works best for a cardigan — cotton blends, bamboo blends, or soft acrylic all work beautifully. Avoid very stiff or bulky fibers, as they can make the finished cardigan feel heavy and boxy.

For a boho, colorful look, pull from your stash and use a different color for each square. For a more minimal aesthetic, choose two or three colors and alternate them in a consistent pattern. A classic palette might be cream, sage, and terracotta. A sophisticated neutral look could be oatmeal and camel. The choice is entirely yours.

Hook: A 5.0mm (H/8) hook is recommended for worsted weight yarn, but always swatch first. Your gauge matters here because you are making a wearable garment.

Notions: Yarn needle for weaving in ends and seaming, scissors, stitch markers, and a tape measure.

Gauge and Sizing

Work a test square before you begin the main project. Your finished granny square should measure 4 inches by 4 inches after blocking. If your square is smaller, go up a hook size. If it is larger, go down a hook size.

This pattern is written in five sizes: Small (S), Medium (M), Large (L), Extra Large (XL), and 2X Large (2XL). The finished measurements are as follows:

Small: 34-inch bust, 22-inch length
Medium: 38-inch bust, 22-inch length
Large: 42-inch bust, 23-inch length
Extra Large: 46-inch bust, 23-inch length
2X Large: 50-inch bust, 24-inch length

Granny square cardigans are typically designed with 2 to 4 inches of positive ease, meaning the finished garment is larger than your actual bust measurement. This gives you room to wear it comfortably over a shirt or fitted top.

Understanding the Granny Square Layout

The cardigan is constructed from a series of 4-inch granny squares arranged into panels. There are five panels total: the back panel, two front panels (left and right), and two sleeves. All squares are worked individually and then joined using the join-as-you-go method or whip stitched together at the end.

Here is the approximate square count by size:

Small: 60 squares total
Medium: 68 squares total
Large: 76 squares total
Extra Large: 84 squares total
2X Large: 92 squares total

Before you begin crocheting, sketch out your layout on graph paper or use a simple spreadsheet. Assign each square a position and plan your colors so you know exactly how many squares of each color you need. This saves time and prevents you from running out of a key color at the wrong moment.

The Classic Granny Square Pattern

If you already have a go-to granny square pattern, feel free to use it as long as your finished square measures 4 by 4 inches. For those who want a tried-and-true version, here is the one used throughout this pattern.

Foundation ring: Using your starting color, chain 4 and join with a slip stitch to form a ring.

Round 1: Chain 3 (counts as first double crochet), work 2 double crochets into the ring, chain 2, (work 3 double crochets into the ring, chain 2) 3 times, join with a slip stitch to the top of the beginning chain 3. Fasten off and pull the tail through to the wrong side.

Round 2: Join your second color in any corner chain 2 space. Chain 3, work 2 double crochets in the same space, chain 1, (work 3 double crochets, chain 2, work 3 double crochets) in the next corner space, chain 1. Continue around, working 3 double crochets and chain 1 in each corner space, then chain 1 between corner clusters. Join with a slip stitch to the top of the beginning chain 3. Fasten off.

Round 3: Join your third color in any corner chain 2 space. Chain 3, work 2 double crochets in the same space, chain 2, work 3 double crochets in the same space (first corner made). Chain 1, work 3 double crochets in the next chain 1 space, chain 1. Repeat the corner pattern at each corner and fill in the side spaces with 3-double-crochet clusters separated by chain 1. Join and fasten off.

This three-round square will measure right at 4 inches with worsted weight yarn and a 5.0mm hook. You can add a fourth round in a border color if you want slightly larger squares or a more defined edge.

Assembling the Panels

Once all your squares are completed, it is time to assemble them into panels. Lay your squares out on a flat surface in your planned arrangement before you join them. Take a photo for reference.

Back panel: The back panel is a rectangle made from squares arranged in rows. For a medium-sized cardigan, you are looking at a panel that is 5 squares wide and 4 squares tall, giving you a back panel approximately 20 inches wide and 16 inches tall before the shoulder shaping.

Front panels: Each front panel is narrower than the back. For a medium, this might be 2 squares wide and 4 squares tall. You will need two of these panels, mirror images of each other.

Sleeves: Each sleeve is a rectangle of squares. The number of squares depends on your desired sleeve length. For a three-quarter sleeve, plan for a sleeve that is 3 squares wide and 3 squares tall. For a full-length sleeve, extend to 4 squares tall.

To join squares, hold two squares with wrong sides facing each other and whip stitch through the back loops only along one edge. Work slowly and keep your tension consistent so the seams lie flat. Alternatively, join squares with a slip stitch seam on the wrong side or use the join-as-you-go method where you attach each new square to the previous one during the final round.

Constructing the Cardigan

Once your panels are assembled, the construction is straightforward.

Start by joining the back panel to each front panel along the side seams. Hold the pieces with right sides together and whip stitch or slip stitch along the side edges, leaving the top open for the armhole.

Next, join the shoulder seams. Place the back panel and front panels together at the top and seam across the shoulders, leaving a center opening for the neck.

Attach the sleeves by folding each sleeve rectangle in half lengthwise and seaming the long edge to form a tube. Then set each sleeve into the armhole opening by aligning the top of the sleeve tube with the armhole edges and seaming around the opening. This is the same technique used in set-in sleeve construction, and taking your time here makes a big difference in how the finished cardigan fits and hangs.

The Tie Front Detail

This is the feature that transforms a simple granny square vest into a cardigan with personality and function.

With the right side of your work facing and starting at the lower edge of the right front panel, work a single crochet border along the entire front opening — up the right front edge, around the neck, and down the left front edge. Work into every available stitch or row end, keeping your tension even. If you notice the edge puckering or ruffling, adjust your stitch count accordingly.

For the ties, you will create two crochet chains, each approximately 18 to 24 inches long, depending on how much length you want for tying. Attach one tie to the right front panel at the point where you want the tie to sit — typically at the natural waist or just below the bustline. Attach the second tie at the corresponding point on the left front panel.

To make each tie, attach your yarn at the attachment point and chain 70 to 90 stitches, or until your chain measures your desired length. Work a single crochet back into each chain for a more finished look and to give the tie a little body so it holds a bow nicely. Fasten off and weave in the ends securely since ties get a lot of use and need a firm anchor.

Alternatively, you can cut two lengths of ribbon in a coordinating color and attach them at the same points. This gives a slightly different look and feel but works just as well functionally.

Finishing Touches

Block your finished cardigan before wearing it. Wet blocking is ideal for natural fibers — simply soak the cardigan in cool water for 20 minutes, gently squeeze out the excess water without wringing, then lay it flat on a blocking mat and pin it to your measurements. Let it dry completely, which usually takes 24 to 48 hours. Blocking relaxes the fiber, evens out the stitches, and helps the squares lay perfectly flat.

For acrylic yarn, steam blocking works well. Hold your iron a few inches above the surface and direct steam at the fabric without pressing down. This relaxes acrylic fibers in a similar way to wet blocking.

Weave in every single tail carefully. Granny square projects generate a lot of ends, and taking the time to weave each one in securely ensures your cardigan holds up over time. Use your yarn needle to weave each tail in one direction and then back the other way through a different path of stitches.

Add a crochet border around the cuffs and the bottom hem if you like. A simple round of single crochet or a picot edge adds a polished finishing touch that makes the cardigan look professionally made.

Styling Your Granny Square Cardigan

The beauty of a tie front cardigan is its versatility. In warmer months, layer it over a simple white tank top with high-waisted denim shorts. In cooler weather, wear it over a fitted turtleneck with slim trousers or jeans. The granny square texture pairs naturally with other boho-inspired pieces — flowy skirts, embroidered blouses, wide-leg pants — but it also works as an interesting contrast against more minimal, tailored pieces.

Play with color when choosing your yarn. A cardigan worked entirely in shades of one color creates a sophisticated, cohesive look. A cardigan worked in bright, clashing colors has a maximalist energy that is deeply joyful. A neutral palette with just one pop of accent color feels balanced and wearable for many occasions.

Tips for Success

Work your granny squares in batches. Sit down for an hour and complete ten squares at once rather than making one square and then assembling it immediately. Batch working keeps your tension consistent and speeds up the project considerably.

Keep a count of your squares as you go. It is easy to lose track, especially across a long project. A simple tally in a notebook prevents the frustrating experience of thinking you are done and discovering you are eight squares short.

Press your finished squares with a warm iron before assembling. Even before full blocking, a quick press helps the squares lay flat and makes assembly much easier.

If joining as you go feels intimidating, start by assembling everything with a whip stitch seam. It is the most accessible joining method and produces a clean, flat seam that wears and washes well.

Why Granny Square Cardigans Will Always Be in Style

Crochet fashion has had an enormous resurgence in recent years, but the granny square never really went away. It has been part of crochet culture since at least the early twentieth century, and the reason is simple: it works. The square shape is endlessly adaptable, the pattern is quick to memorize, and the finished fabric is both lightweight and textured in a way that no other construction method quite replicates.

A granny square tie front cardigan is the kind of garment you will wear for years. It is handmade in a way that is visible and intentional, something that invites compliments and conversations. People will ask where you got it, and you will get to tell them you made it yourself.

That, ultimately, is what makes crochet garments so rewarding to make. They are not just objects. They are small, wearable records of your time, your creativity, and your skill. Every square in this cardigan represents a few minutes of your hands working, choosing colors, building something from nothing. When you put it on, you wear all of that with you.

So gather your yarn, choose your colors, and start squaring. Your granny square tie front cardigan is waiting to be made.