Can I use a different yarn than the ones listed in the materials?

Yes, as long as it is a smooth worsted weight or heavy DK that hits the listed gauge. Avoid fuzzy or bouclé yarns, since they will obscure the petal detail that makes the sunflower squares work.

Do I need to swatch before starting?

I would, especially since gauge is critical for this garment to fit as intended. Swatch and wash your swatch first, particularly if you are working with a natural fiber like the superwash merino option, since it may bloom after washing.

Why does the pattern use two different hook sizes?

The larger J hook keeps the granny squares and main body open and well defined, while the smaller I hook tightens up the ribbing at the waistband and cuffs. That size difference is what gives the ribbed sections their snug, stretchy feel.

What is the hardest part of this pattern for an intermediate crocheter?

Most people find the join-as-you-go assembly and strap construction the trickiest part, since you are tracking stitch counts across multiple joined pieces at once. The granny squares themselves are approachable even for confident beginners.

How long should I expect this project to actually take?

Plan on roughly 25 to 35 hours total across square construction, joining, assembly, ribbing, and finishing. That does not include the additional blocking and drying time once the overalls are complete.

Ocean blue granny square overalls for baby

LevelIntermediate
Time25-35 hours
Hook6.0 mm
YarnWorsted

About This Pattern

This one feels like a bright morning at the shore, the kind where navy and teal and that soft periwinkle all sit together without fighting. The sunflower-style petals give each square a little dimension, so the bib catches light instead of lying flat. It is playful but tailored, which is a hard combination to land in baby wear.

Finished, this sits folded over a changing table or draped on a nursery chair, structured enough to hold its own shape without a baby in it. The star buttons catch the eye first, then people notice the layered petals on the bib. It reads as handmade couture, not a quick weekend gift.

Work the sunflower-style granny squares in your assigned colors, building each one through its petal and outline rounds.
Join squares as you go rather than seaming afterward, connecting them square by square into flat leg and bib sections.
Assemble the trouser legs from their joined squares, then seam the legs together at the crotch to form the body.
Add the bib front panel with its single large center square and attach the matching back panel.
Repeat the ribbing technique for the ankle cuffs on the bottom edge of each leg tube.
Make the two straps separately, then attach them to connect the bib front to the back panel.
Sew on the star-shaped buttons, weave in every end, and block the whole garment flat to its finished shape.

On the desk

You’ll need worsted weight yarn (CYCA 4) with smooth plied construction for the best stitch definition in your granny squares.

Suggested yarns

Lion Brand Pound of Love (100% acrylic, 1020 yards per 16 oz skein) offers excellent stitch definition, is machine washable, has a wide color range, and is budget friendly for gift giving.
Paintbox Yarns Simply DK (used at worsted tension with a slightly larger hook) provides very smooth texture and outstanding color consistency for colorwork squares. It’s 100% acrylic and machine washable.
Cascade 220 Superwash (100% superwash merino, 220 yards per 100g skein) gives superior drape and softness against baby skin. It’s machine washable but more expensive. Worth it for a luxurious result.

Substitution note

Choose any smooth worsted weight or heavy DK that achieves the listed gauge. Avoid fuzzy or bouclé yarns as they obscure the granny square pattern detail. Always swatch and wash your swatch before beginning, especially with natural fibers that may bloom after washing.

Color A (Navy): 350 yards / 320 meters (waistband, cuffs, straps, square outlines, bib back)
Color B (Teal): 200 yards / 183 meters (square petals and borders)
Color C (Mint): 200 yards / 183 meters (square petals and borders)
Color D (Cream/Off-white): 100 yards / 91 meters (square centers and petal accent rounds)
Color E (Periwinkle/Soft blue-grey): 75 yards / 69 meters (square accent petals)

US size J / 6.0 mm for granny squares and main body construction
US size I / 5.5 mm for ribbing at waistband and cuffs (produces tighter rib)

Yarn needle / tapestry needle
Stitch markers (at least 6)
Scissors
2 star-shaped buttons, approximately 3/4 inch / 2 cm diameter
Sewing needle and matching thread for button attachment
Rust-proof pins or blocking pins
Blocking mats

Stitch shorthand

ch — chain (wrap yarn over hook and pull through loop)
sl st — slip stitch (insert hook, yarn over, pull through stitch and loop on hook in one motion)
sc — single crochet (insert hook, yarn over, pull up loop, yarn over, pull through both loops)
hdc — half double crochet (yarn over, insert hook, pull up loop, yarn over, pull through all 3 loops)
dc — double crochet (yarn over, insert hook, pull up loop, yarn over, pull through 2 loops twice)
tr — treble crochet (yarn over twice, insert hook, pull up loop, [yarn over, pull through 2 loops] 3 times)
st/sts — stitch/stitches
sp — space
ch-sp — chain space
rep — repeat
pm — place marker
rm — remove marker
RS — right side
WS — wrong side
JAYG — join as you go
BLO — back loop only (work into only the back loop of the stitch, leaving front loop unworked)
sk — skip
beg — beginning
cont — continue
approx — approximately
tog — together
inc — increase (work 2 stitches in same stitch)
dec — decrease

Ocean blue granny square overalls for baby

Assembly

Step 1 Weave in all remaining ends thoroughly, at least 6 inches into the fabric in different directions.
Step 2 Block the completed overalls by soaking in cool water for 20 minutes, pressing out excess water in a towel without wringing, then pinning flat to blocking mats to the finished dimensions. Allow to dry completely, 24 to 48 hours.
Step 3 Final measurements after blocking:
Step 4 Chest circumference: 20 inches / 51 cm
Step 5 Overall length shoulder to ankle: 22 inches / 56 cm
Step 6 Waistband depth: 1.75 inches / 4.5 cm
Step 7 Bib height: approximately 5 inches / 13 cm (square 4 inches plus extension 1 inch)
Step 8 Ankle cuff depth: 1.5 inches / 4 cm
Step 9 Inseam: approximately 9 inches / 23 cm

Easy to get wrong

Petals worked in the wrong direction

Remember that round 3 is worked from the back, behind the petals, directly into the round 1 stitches. If you accidentally work into the petal stitches instead, the layered sunflower look will not form, so unpick back to round 2 and check you are inserting the hook behind the loops.

Losing the ribbing stitch count

Because the BLO ribbing is worked in turned rows joined into a round, it is easy to pick up an extra stitch at the turn. Place a marker at the join point for every ribbing round and count before you fasten off.

Mismatched squares at the join-as-you-go stage

Squares joined with the wrong edge facing out will twist the leg tubes once seamed. Lay all squares for one leg flat in their final layout before joining so you can see any color or orientation errors right away.

Between the songs

What makes this one worth the hours is the sunflower-style petal motif, where you work behind the previous round's stitches to push petals forward into real texture. You are not just making a flat square, you are learning to read a stitch from the back side and trust that it will look right from the front. Then there is the join-as-you-go assembly, which turns a pile of individual motifs into trouser legs and a bib without a separate seaming session. The ribbed waistband, straps, and ankle cuffs add a completely different rhythm, worked in back loops only for that classic knit-look stretch. By the end you have practiced colorwork, dimensional stitching, garment shaping, and finishing, all in one project.

Listener questions

Can I use a different yarn than the ones listed in the materials?
Yes, as long as it is a smooth worsted weight or heavy DK that hits the listed gauge. Avoid fuzzy or bouclé yarns, since they will obscure the petal detail that makes the sunflower squares work.
Do I need to swatch before starting?
I would, especially since gauge is critical for this garment to fit as intended. Swatch and wash your swatch first, particularly if you are working with a natural fiber like the superwash merino option, since it may bloom after washing.
Why does the pattern use two different hook sizes?
The larger J hook keeps the granny squares and main body open and well defined, while the smaller I hook tightens up the ribbing at the waistband and cuffs. That size difference is what gives the ribbed sections their snug, stretchy feel.
What is the hardest part of this pattern for an intermediate crocheter?
Most people find the join-as-you-go assembly and strap construction the trickiest part, since you are tracking stitch counts across multiple joined pieces at once. The granny squares themselves are approachable even for confident beginners.
How long should I expect this project to actually take?
Plan on roughly 25 to 35 hours total across square construction, joining, assembly, ribbing, and finishing. That does not include the additional blocking and drying time once the overalls are complete.

Original pattern: https://crochr.com/ocean-blue-granny-square-baby-overalls-free-crochet-pattern/

About the Author

Marisol QuinteroWho runs Crochet Obsessed, why a stitch count sits at the end of every round, how a pattern gets written here, and the things this site will never do.

Ocean blue granny square overalls for baby

About This Pattern