Free Crochet Baby Boy Dress Sweater Pattern (0 to 12 Months)

crochet Baby Boy Dress Sweater 5

A crochet baby boy sweater written in sizes from newborn to twelve months, so you can make ahead or make to fit. Grey and white here, though it works in anything. Sized properly rather than one pattern stretched to cover everything. Instructions run through all the sizes.

A full blue and white layette set for a baby boy is one of those projects that never goes out of style, and this one covers everything from the collared cardigan right down to the matching hat and mittens. The stripe repeat is simple enough to memorize after the first few rows, which makes the whole set surprisingly quick to work through once you find your rhythm and if you have already made the crochet baby sweater, this set is a natural next project to add alongside it.

Crochet Baby Boy Dress Sweater

Pinterest pin graphic of a crochet baby boy dress sweater layette set in blue and white stripes with cardigan, trousers, hat and mittens, sourced from Craft and Crochet

The cardigan features a neat white collar, button front and set-in sleeves, while the trousers have a drawstring waist with pompom ties that make sizing flexible across the newborn to three month range. All four pieces use the same blue and white stripe sequence, so the finished set looks completely coordinated without requiring any extra planning.

Materials

  • Double knitting (DK) weight yarn in two colors: white (main) and blue (contrast), approximately 100 grams / 330 meters per ball
  • A 4.0 mm crochet hook
  • 4 small buttons
  • Yarn needle
  • Stitch markers

Handy Stitch to Know

The Modern Double Crochet (MDC)

This is the only non-standard stitch in the pattern. Yarn over, insert hook, pull up a loop (3 loops on hook). Yarn over and pull through the first loop only — 3 loops remain. Yarn over, pull through 2 loops. Yarn over, pull through the remaining 2 loops. The resulting elongated stitch sits forward from the fabric as a raised bubble. Alternate it with single crochets throughout the body and sleeves.

The Pattern

The Raglan Yoke (Rows 1–6)

Using white (main color), chain 42 for size 0–3 months.

  • Row 1: Turn, skip the first 3 chains (counts as the first double crochet), and work 1 double crochet into the 4th chain. Place a total of 6 double crochets, then create the first corner window by working 1 double crochet, chain 1, 1 double crochet into the same chain space. Continue across, following standard raglan distribution to establish 4 corner windows total.

Never read a crochet pattern before? No problem! The video tutorial below is perfect for beginners, or give the written pattern below a try!

Color stripe schedule:

  • Rows 1–2: white
  • Row 3: blue
  • Rows 4–5: white
  • Row 6: blue

Finished blue and white striped crochet baby cardigan held open to show the full length and collar detail

Divide for Armholes and Set Up the Texture Pattern (Row 7)

Switch to blue.

  • Front panel: Chain 1 and turn. Single crochet in the very first space. Alternate 1 MDC, 1 single crochet across the front stitches until you reach the first corner window. (Creates 8 texture bubbles.)
  • First armhole join: Bring the 1st and 2nd corner chain-spaces together. Insert your hook through both layers simultaneously and work 1 single crochet to join them, bypassing the sleeve stitches.
  • Back panel: Alternate 1 MDC, 1 single crochet across the back panel to the next corner window. (Creates 16 texture bubbles.)
  • Second armhole join: Bring the 3rd and 4th corner chain-spaces together and join with 1 single crochet.
  • Second front panel: Repeat the MDC / single crochet pattern across the final section (8 texture bubbles), ending with a single crochet in the top of the last stitch. Fasten off blue.

Close-up of hands using a silver crochet hook to work a white yarn stitch into blue and white striped baby crochet fabric

Body Flare and Increase Row (Row 8)

Switch to white. Attach yarn to the last single crochet made. Chain 3 (counts as first double crochet) and turn.

  • Front section increases: Work 3 double crochets, then 2 double crochets in the next stitch (increase). Repeat across to reach 21 double crochets total.
  • Back section increases: Work 7 double crochets, then 2 double crochets in the next stitch (increase). Repeat across the back to reach 36 double crochets total.
  • Opposing front section: Mirror the first side, increasing every 4th stitch to reach 21 double crochets total.
  • Total stitch count (0–3 months): 79 double crochets across.

Grow the Textured Body (Rows 9–14)

No more increases from here. Repeat the following two-row sequence:

  • Texture row (blue): Chain 1 and turn. Alternate 1 single crochet, 1 MDC all the way across. End on a single crochet. Fasten off blue. (39 texture bubbles total.)
  • Solid row (white): Attach white. Chain 3 and turn. Work 1 double crochet into every stitch across. (79 double crochets.)

Total rows by size:

  • 0–3 months: 14 rows
  • 3–6 months: 16 rows
  • 6–9 months: 18 rows
  • 9–12 months: 19 rows

Hands holding a small blue and white striped crochet baby cardigan body piece, showing the shaped armhole opening

Bottom Ribbed Border

Using white:

  • Row 1: Chain 3 and turn. Alternate 1 front post double crochet and 1 back post double crochet across the row. Place a standard double crochet in the very last stitch.
  • Row 2: Chain 3 and turn. Work a back post double crochet over every back post stitch and a front post double crochet over every front post stitch to keep the ribbing aligned.
  • Row 3: Work a final row of standard solid double crochets to cleanly bind off the edge. Do not fasten off — continue directly into the front bands.

Button Band and Buttonhole Band

  • Row 1 (base): Turn 90 degrees to crochet vertically up the open front edge. Place 2 single crochets into the side of every double crochet row edge, and 1 single crochet into the side of every single crochet row edge.
  • Rows 2–3: Chain 1 and turn. Work 1 single crochet into every stitch.
  • Row 4 (buttonhole side only): Mark 4 evenly spaced buttonhole positions. Single crochet up the row, but at each marker chain 1 and skip 1 stitch to leave a gap.
  • Row 5: Chain 1 and turn. Single crochet into every stitch, working 2 single crochets into each chain-1 gap to secure the buttonhole edges. Fasten off. Work 5 rows of solid single crochet on the opposing front edge (no gaps) to create the button landing pad.

Close-up of hands joining blue and white crochet stripe rows at the neckline edge of a baby cardigan in progress

The Fold-Over Collar

Attach white to the neck opening, beginning just past the button band.

  • Row 1: Chain 3, work 2 double crochets in the first stitch, double crochet across the neck edge, and work 2 double crochets in the final neck stitch before the opposite band. (38 double crochets total.)
  • Rows 2–6: Chain 3 and turn. Work 2 double crochets in the first stitch and 2 double crochets in the last stitch of every row. Stitch counts increase each row: 40 → 42 → 44 → 46.
  • Row 7: Chain 1 and turn. Work 1 single crochet into every stitch across to establish a clean edge. (48 single crochets.) Fasten off.

The Sleeves (Make 2)

  • Round 1 (blue): Join blue directly under the armhole opening. Work the alternating MDC / single crochet texture pattern in a circle around the armhole (14 bubbles total). Slip stitch to join, pulling white through the loop to transition colors. Do not cut blue — carry it up inside.
  • Round 2 (white): Chain 3. Work 1 double crochet into every stitch around. Slip stitch to join, carrying blue back up.
  • Repeat this 2-round sequence until you match the body length (14 rounds total for 0–3 months).
  • Cuff trim: Work 3 rounds of alternating front post and back post double crochet ribbing. On the final round, decrease the cuff slightly by working front post stitches together at the bottom seam. Fasten off and weave in all loose ends.

Complete crochet baby boy layette set in blue and white stripes laid flat, including cardigan, trousers, hat and mittens

Tips

  • Carry the yarn rather than cutting. On the sleeves, drop the old color and pull the new one through the slip stitch rather than cutting at every color change. It keeps the interior clean and reduces the ends to weave in significantly.
  • Adjust for larger buttons. If your buttons are larger than a standard small shirt button, chain 2 and skip 2 stitches on Row 4 of the buttonhole band instead of chain 1 / skip 1, to prevent the fabric from pulling tightly.
  • Count texture bubbles after Row 7. The 8-16-8 distribution of bubbles across the front, back, and front sections is how you confirm the armhole joins are correctly placed before building the body.

Frequently Asked Questions

1. What is the modern double crochet (MDC) and why is it used here? The MDC is a modified double crochet that pulls the stitch forward as it closes, creating a raised elongated bubble on the right side of the fabric. Alternating it with single crochets produces the textured stripe pattern that runs through the body and sleeves.

2. Can this be sized up for an older baby by adding more rows? The pattern already gives row counts for 0–3 through 9–12 months. Beyond 12 months, you can continue adding 1 to 2 rows per size to extend the length, using the existing two-row texture repeat (blue MDC row, white double crochet row) and the same ribbing at the end.

3. Why does the collar increase on every single row rather than alternating? Increasing on every row creates a steep flare angle that gives the collar enough width to fold down dramatically. Using every-other-row increases would produce a flatter, tighter collar that doesn’t drape as well. The 7-row sequence takes the stitch count from 38 to 48, which is just enough width for the collar to turn over cleanly.

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