Granny squares on a baby cardigan? That sounds complicated. I get it. But here’s the truth: if you can make a basic granny square and work a single crochet, you already have every skill you need for this project.
The construction looks impressive, but it breaks down into simple, manageable pieces. You make individual squares. You join them together. You add some ribbed borders. That’s genuinely it. No complex shaping. No confusing armhole decreases. No picking up hundreds of stitches around a curved neckline.
Whether you’ve been crocheting for years or you just graduated from your first dishcloth, this blue granny square baby cardigan crochet pattern meets you where you are. The squares are small enough to finish during a lunch break. The joining method is straightforward. And the finished result? Absolutely stunning. Let me walk you through every single step.
Why This Baby Cardigan Works So Beautifully
This cardigan uses classic granny squares as building blocks. Each square measures just 3 inches, which means they work up quickly and travel well. The soft sky blue main color pairs with crisp white contrast borders to create that gorgeous lattice effect you see in the photos.
The construction method is what makes this pattern so approachable. Instead of working the entire body in one piece with complicated increases and decreases, you simply arrange your finished squares into panels. Two squares wide for each front. Four squares wide for the back. Join them together, add sleeves made the same way, then finish with stretchy ribbed borders at the neckline, button bands, hem, and cuffs.
Five wooden buttons close the front, and a sweet little patch pocket adds the perfect finishing touch. The whole thing comes together in about 12 to 18 hours for someone comfortable with basic techniques.
Skill Level and What You Need to Know
I rate this pattern as intermediate. You should feel confident working granny squares, joining motifs with slip stitch seams, working ribbed borders by picking up stitches along edges, and sewing set-in sleeves. None of these techniques are difficult on their own. The coordination of putting everything together is what bumps this up from beginner level.
If you’ve never made a granny square before, practice one or two first. Once that clicks, you’re ready.
Finished Measurements
This pattern fits newborn to 3 months with the following dimensions:
Size customization tips appear at the end if you need to go larger.
Materials You’ll Need
Yarn:
Hook: US size G-6 / 4.0 mm crochet hook
Notions:
Yarn Suggestions That Work Well
Lion Brand Pound of Love is my top pick for baby projects. It’s 100% acrylic, incredibly soft, and completely machine washable. One skein of each color gives you way more than enough.
Paintbox Yarns Simply DK offers consistent tension, tons of colors, and budget-friendly pricing. Grab 2 skeins of your main color and 1 skein of contrast.
Drops Safran works beautifully if you prefer a cotton blend for warmer weather or sensitive skin. It’s slightly less stretchy than acrylic, so check your gauge extra carefully.
Any DK weight yarn (CYCA weight 3) that achieves gauge will work. Prioritize machine washable options for baby garments and avoid fuzzy or textured yarns that would hide your beautiful stitch definition.
Gauge (Please Don’t Skip This)
One granny square through Round 3 should measure 3 inches by 3 inches (7.5 cm by 7.5 cm) after blocking.
Ribbing gauge: 5 single crochet stitches by 6 rows equals 1 inch by 1 inch (2.5 cm by 2.5 cm) using back loop only single crochet.
Gauge matters for garments. If your square measures larger than 3 inches, try a smaller hook. If it measures smaller, go up a hook size. Make one test square before committing to all 36.
Abbreviations and Stitch Definitions
Let me break down every abbreviation you’ll encounter:
Special Stitches Explained
Granny Cluster
This is the heart of every granny square. Yarn over, insert your hook into the designated space, yarn over, pull up a loop, yarn over, draw through 2 loops. That’s one double crochet. Without removing your hook, work 2 more double crochets into the same space. You now have 3 double crochets grouped together. Throughout this pattern, that group of 3 is called one granny cluster.
Join-As-You-Go Corner Join (JAYG)
When working the final round of a new square that needs to connect to an already completed square, you’ll replace the normal chain spaces with joins. For corners, instead of chain 2, you work: chain 1, slip stitch into the corresponding corner space of the adjacent square, chain 1. For side spaces, skip the chain entirely and slip stitch directly into the corresponding side space. This creates an invisible, flat join on the right side.
Back Loop Only Single Crochet Rib (blo-sc rib)
Work your single crochet by inserting the hook under only the back loop of each stitch. When worked back and forth in rows, this creates a stretchy, textured rib perfect for borders.
How Many Squares Do You Need?
Here’s your complete square breakdown:
Total full squares needed: 36
Total pocket squares: 1 partial square
Color Sequence for Each Square
This creates that beautiful lattice effect where white frames every square.
Granny Square Instructions (Make 36)
Using MC, make a magic ring. Alternatively, chain 4 and join with a slip stitch to form a ring.
Round 1 (MC): Ch 3 (counts as first dc throughout), work 2 dc into ring, ch 2, (3 dc into ring, ch 2) 3 times, join with sl st to top of beginning ch-3. Fasten off MC. (4 granny clusters, 4 ch-2 corner spaces)
Round 2 (MC): Join MC with sl st to any ch-2 corner space. Ch 3, work 2 dc into same corner space, ch 2, work 3 dc into same corner space, ch 1. (Work 3 dc, ch 2, 3 dc into next corner space, ch 1) 3 times. Join with sl st to top of beginning ch-3. Fasten off MC. (8 granny clusters, 4 ch-2 corner spaces, 4 ch-1 side spaces)
Round 3 (CC): Join CC with sl st to any ch-2 corner space. Ch 3, work 2 dc into same corner space, ch 2, work 3 dc into same corner space, ch 1. Work 3 dc into next ch-1 side space, ch 1. (Work 3 dc, ch 2, 3 dc into next corner space, ch 1, work 3 dc into next ch-1 side space, ch 1) 3 times. Join with sl st to top of beginning ch-3. Fasten off CC. (12 granny clusters, 4 ch-2 corner spaces, 8 ch-1 side spaces)
Each completed square measures 3 inches by 3 inches (7.5 cm by 7.5 cm).
Stop and check: After completing your first square, block it and measure. It must be 3 inches by 3 inches before you continue making all 36.
Pocket Square Instructions (Make 1)
Work Rounds 1 and 2 only of the granny square instructions, both in MC. After Round 2, work Round 3 in CC but do NOT fasten off. Instead, work a single crochet border:
After the final join of Round 3, ch 1, work 1 sc into each dc and 1 sc into each ch-1 side space and 2 sc into each ch-2 corner space around all 4 sides. Join with sl st to first sc. Fasten off CC, leaving a 12-inch (30 cm) tail for sewing.
The pocket square should measure approximately 2.25 inches by 2.25 inches (5.7 cm by 5.7 cm).
Assembly Instructions
Step 1: Arrange Your Squares
Lay out all squares on a flat surface with the right side facing up. Arrange them as follows:
Step 2: Join Squares Within Each Panel
Use the Join-As-You-Go method on the CC round, working row by row from left to right, then bottom to top. When making a new square that shares a side with a completed square, work the JAYG joins along all shared sides during the final CC round.
Alternatively, if you crocheted all 36 squares individually first, join them using a flat slip stitch seam: hold two squares with right sides together and slip stitch through both back loops of corresponding stitches along the shared edge using CC.
Step 3: Join Panels
Join the right front panel to the right side of the back panel along the 3-square tall side edge. Join the left front panel to the left side of the back panel along the 3-square tall side edge. The top row of all panels forms the shoulder line.
Step 4: Join Shoulder Seams
With right sides together, slip stitch the top edge of the back panel to the top edges of the front panels. Each front shares 1.5 squares worth of shoulder with the back (approximately 4.5 inches or 11.5 cm). The center 1 square of the back top edge (approximately 3 inches or 7.5 cm) remains open as the neckline.
Step 5: Set in Sleeves
Each sleeve panel measures 6 inches wide by 9 inches tall. Pin the sleeve top edge into the armhole opening and seam with slip stitch, easing any fullness evenly. Join the underarm and sleeve side seam by seaming the full length of one long edge of the sleeve panel.
Step 6: Join Side Seams
The body side seams run from the underarm to the hem, spanning 2 squares tall (6 inches). Seam with slip stitch using CC, right sides together, through the outer loops only.
Checkpoint: Your assembled garment body should measure approximately 9 inches tall from hem to shoulder seam and 17 inches chest circumference when buttoned.
Neckline Ribbing
With RS facing and CC, pick up and sc evenly around the entire neckline opening. You should have approximately 42 sc around the neckline. Adjust to the nearest even number if needed.
Row 1 (WS): Ch 1, turn. Sc in blo of each st across. (42 sc)
Row 2 (RS): Ch 1, turn. Sc in blo of each st across. (42 sc)
Row 3 (WS): Ch 1, turn. Sc in blo of each st across. (42 sc)
Row 4 (RS): Ch 1, turn. Sc in blo of each st across. (42 sc)
Row 5 (WS): Ch 1, turn. Sc in blo of each st across. (42 sc)
Row 6 (RS): Ch 1, turn. Sc in blo of each st across. (42 sc)
Fasten off. The neckline rib should measure approximately 1 inch (2.5 cm) tall.
Button Band (Right Front)
With RS facing and CC, pick up sc evenly along the right front opening edge. Aim for approximately 45 sc along the full 9-inch height. Adjust to the nearest odd number.
Rows 1 through 6: Ch 1, turn. Sc in blo of each st across. (45 sc)
Fasten off. Band measures approximately 1 inch (2.5 cm) wide.
Buttonhole Band (Left Front)
With RS facing and CC, pick up 45 sc evenly along the left front opening edge.
Row 1 (WS): Ch 1, turn. Sc in blo of each st across. (45 sc)
Row 2 (RS): Ch 1, turn. Sc in blo of each st across. (45 sc)
Row 3 (WS, buttonhole row): Ch 1, turn. Sc in blo of first 4 sts. (Ch 2, sk next 2 sts, sc in blo of next 7 sts) 4 times. Ch 2, sk next 2 sts, sc in blo of last 3 sts. (45 sts, 5 buttonholes)
Row 4 (RS): Ch 1, turn. Sc in blo of each st across, working 2 sc into each ch-2 buttonhole space. (45 sc)
Row 5 (WS): Ch 1, turn. Sc in blo of each st across. (45 sc)
Row 6 (RS): Ch 1, turn. Sc in blo of each st across. (45 sc)
Fasten off.
Hem Ribbing
With RS facing and CC, pick up sc evenly along the entire lower hem edge of the joined body. Pick up approximately 12 sc per square bottom edge for a total of approximately 96 sc across the full hem.
Rows 1 through 6: Ch 1, turn. Sc in blo of each st across. (96 sc)
Fasten off. Hem rib measures approximately 1 inch (2.5 cm) tall.
Cuff Ribbing (Make 2)
With RS facing and CC, pick up sc evenly around the open lower edge of one sleeve. Pick up approximately 24 sc (12 per square edge). Join with sl st to work in rounds.
Rounds 1 through 6: Ch 1, sc in blo of each st around. Join with sl st to first sc. (24 sc)
Fasten off. Cuff measures approximately 1 inch (2.5 cm) tall.
Repeat for the second sleeve cuff.
Pocket Attachment
Pin the completed pocket square to the lower right front panel. Center it on the second square from the bottom, approximately 0.5 inch (1.3 cm) from the center front edge. Using CC and the long tail, whipstitch the pocket along the bottom and both side edges, leaving the top open. Weave in all tails.
Button Attachment
Mark 5 button positions on the right front button band, spacing them evenly. The first button sits approximately 0.5 inch (1.3 cm) from the neckline edge. The last button sits approximately 0.5 inch (1.3 cm) from the hem edge. Using sewing needle and thread, sew each wooden button securely. Align with the corresponding buttonholes on the left front band.
Finishing and Blocking
Weave in all remaining yarn tails, working ends into the back of stitch clusters.
Wet blocking: Submerge the finished cardigan in cool water, gently press out excess water in a towel (do not wring), and pin flat to a blocking mat at the finished dimensions. Allow to dry completely.
Steam blocking (for acrylics): Hold a steam iron several inches above the surface and apply steam without pressing the iron against the fabric.
Blocking evens your squares, opens the lace structure, and relaxes the seams for a polished finish.
Care Instructions
For machine washable acrylic yarns, wash cold on a gentle cycle and lay flat to dry. Do not tumble dry.
For cotton blend yarns, hand wash in cool water with mild detergent, rinse gently, press out water without wringing, and lay flat to dry.
Size Customization Tips
Each granny square is 3 inches. Adding one column of squares to the body increases chest circumference by 6 inches. Adding one row increases body or sleeve length by 3 inches.
For 3 to 6 months: Add one additional row to the body and one to each sleeve. Chest circumference becomes approximately 19 inches with ribbing. This requires approximately 15 additional yards of MC and 10 yards of CC per extra row.
For 6 to 12 months: Add one column to the back (5 squares wide) and one row to the body and sleeves. Chest circumference becomes approximately 21 inches. Adjust buttonhole placement proportionally.
Thank you so much for choosing this pattern for your next project. I truly hope you love making this sweet little cardigan as much as I loved designing it. If you make one, I would absolutely love to see it! Share your finished photos on Instagram or tag me on Facebook.
If this pattern caught your eye, go ahead and save it to your Pinterest boards so you can find it when you’re ready to start. And please drop a comment below if you make one. I read every single comment and love hearing how your projects turn out!
