Rainbow Baby Crochet Romper Pattern

Every new arrival needs a cute little romper to wriggle around in! This baby crochet romper pattern is made in one piece with no tricky stitches or shaping to worry about.

It come in sizes newborn to 12 months so you can either make it for a baby that’s about to arrive or one you haven’t gotten a present for yet!

This unisex babygrow (as we call them here in the UK) can be made for both boys and girls and styled accordingly. Although it’s great for summer and springtime, nice and breezy, you can add a warm shirt and leggings underneath for winters or a sweater on top. With a nice pair of booties and a headband, it can even be made into a set.

While I used this beautiful rainbow yarn for my crochet baby romper, you can make it in whichever color you like, solid or variegated.

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Scroll down and sign in to find the Rainbow Baby Crochet Romper Pattern, or purchase an ad-free, printable PDF version here:

More about this rainbow baby crochet romper

The pattern is worked together in one flat piece so you won’t have much seaming to do at the end (except to weave in those ends!). It might seem like there’s a lot happening in this romper but don’t worry — everything is explained in great detail to make the journey smoother for you!

Once you’re done, you can do so much with this great little baby outfit. I’ve added yellow buttons to mine and you can appliqué a character or initials on yours for personalization.

The entire romper is made with slip stitches so you won’t need to learn any difficult new technique. But if you haven’t used this method before, this is a great pattern to start with!

How do you crochet a rainbow baby romper like this?

From the front bib to the gussets, the back, and both straps, everything is worked in sequence to create the shape. This crochet baby romper is worked up with slip stitches which gives it that unique texture.

If you’re using variegated or ombré yarn, the stitch used creates a beautiful effect with different colors peeking through in each row.

Yarn

To crochet this little romper, I used the stunning West Yorkshire Spinners Colour Lab (100% wool, 100g/225m) in the color Prism Brights (894). I really like how it made the final piece look without having to change colors at all!

According to the size you’re making, the amount of yarn used will vary between 1-2 balls of 100g yarn. The sizing chart is given below.

Alternatively, here are some beautiful yarns that would also work really well to crochet this baby suit:

• Swish DK by WeCrochet (100% Fine Superwash Merino Wool; 123yds/50g)
• DROPS Cotton Merino (50% fine merino, 50% Egyptian cotton; 110m/50g)
• Paintbox Yarns Simply DK (100% acrylic, 276m/100g)

Tension and Sizing

17 sts and 26 rows measure 10x10cm (4x4in) over slip stitch if you’re using a 6mm hook. You can adjust the hook size to obtain the correct tension. Depending on who you’re making the romper for, you can check the measurements in this sizing chart and also see how much yarn you need:

Materials

Along with your yarn, you will need the following:

• 6mm (US J/10) crochet hook
• Scissors
• Tapestry needle
• 8 buttons (1.5cm diameter)
• Stitch marker

Pattern Options

Get this crochet pattern free in this blog post in US terms – just scroll down to find it in the exclusive members area! You can also purchase an ad-free, printable PDF in both US and UK terms with added extras in my pattern stores: 

Don’t forget to join HanJan Crochet to receive regular discount codes (and more free patterns!) and Pin this free baby crochet romper pattern to your crochet Pinterest board!

Glossary and Abbreviations

ch(s) – chain(s)

sp – space

ss – slip stitch

RS – right side

WS – wrong side

sk – skip

rep – repeat

dnc – does not count

yoh – yarn over hook

bl – back loop only

fl – front loop

Crochet Stitch

The main stitch is:

ss – slip stitch

Special Stitches

We’re using a slight variation on the slip stitch in this pattern that you might be new too.

If you want to make more crochet projects for the little ones in your life, I’ve got a few suggestions for you (and you can search my blog for many more patterns too):

• The Lazy Day Jumper (there are so many great sizing options in this one!)
• Basketweave Beanie Hat (would pair nicely with this romper if you make both for warmer weather)
• Wrap Around Baby Boots (to keep those little toes warm)

The special stitch used in this romper is given below:

Ss2tog

Insert hook in next st, insert hook in next st, yoh and pull loop through both sts.

Pattern Notes

The Front Bib and shaped Gusset are made in one piece top down. The Gusset is folded at the narrowest point and the Back is worked from the end of the Gusset with extensions on each side to make it wider.

The centre Back is shaped. Front shaping and Straps are also worked from the top of the unworked Back piece on each side. The Straps are joined to the top Back shaping (see Diagram given below).

The Back piece is folded around the Front so that the buttons can be secured through spaces between stitches on the Front Bib.

Ensure buttons are stitched on securely.

The beginning ch1 counts as the first ss and the stitch at the base of the ch-1 should be skipped. At the end of the next row, the final ss is worked into the top of this ch.

Free Rainbow Baby Crochet Romper Pattern

FRONT BIB

Ch 22 (23:25:26)

Row 1 (WS) Ss in second ch from hook and each ch across, turn, [21 (22:24:25) sts]

Row 2 (RS) Ch1, ss in fl of each st across, turn.

Row 3 Ch1, ss in bl of each st across, turn.

Repeat Rows 2-3 until Bib measures 20 (21:22:22) cm long, ending on a WS row.

Do not fasten off

GUSSET

On decreasing rows, do not work a ch1 at the start of each row. Instead work a ss2tog into first 2 sts.

Row 1 (RS) (Ss2 tog) in fl of first 2 sts, ss in fl of each st to final 2 sts, (ss2tog) final 2 sts, turn. [19 (20:22:23) sts]

Row 2 Ch1, ss in bl of each st across, turn. Repeat Rows 1-2 another 3 (3:4:5) times

[13 (14:14:13) sts]

Next row (RS) Ch1, ss in fl of first st (counts as 2 ss), ss in fl of each st to final st, ss in fl of final st, ss through both loops on final st, turn.

[15 (16:16:15) sts]

Next row Ch1, ss in bl of each st across, turn.

Rep prev 2 rows another 8 (9:10:11) times

[31 (34:36:37) sts]

On increasing rows, do not skip the st at base of beg ch-1.

Next row Ch1, ss in fl of first st (counts as 2 ss), ss in fl of each st to final st, ss in fl of final st, ss through both loops on final st, turn.

[33 (36:38:39) sts]

Fasten Off

BACK

Row 1 (WS) Ch12 (12:12:13), ss in bl of each st across final row of Gusset, ch13 (13:13:14), turn.

Row 2 (RS) Ss in second ch from hook, ss in each ch and fl across to next ch length, ss in each ch across, turn. [57 (60:62:65) sts]

Row 3 Ch1, ss in bl of each st across, turn.

Row 4 Ch1, ss in fl of each st across, turn.

Rep Rows 3-4 until Back measures 15 (15:16:16) cm, ending on a WS row.

Fasten off.

BACK SHAPING

With RS facing, join yarn in 13th (13th: 13th: 14th) st across Back

Row 1 (RS) Ch1, ss in fl of next 32 (35:37:38) sts,

turn leaving rem sts unworked, pm in first unworked st [33 (36:38:39) sts]

Row 2 Ch1, ss in bl of each st across, turn.

Row 3 (Working in fl only) (Ss2tog) first 2 sts, ss in each st to final 2 sts, (ss2tog), turn.

[31 (34:36:37) sts]

Row 4 As Row 2.

Rep Rows 3-4 another 6(7:8:8) times. [19(20:20:21)sts]

Fasten off

FRONT RIGHT SHAPING

With RS facing, join yarn in first st from final row of Back

Row 1 (RS) Ch1, ss in fl of next 11 (11:11:12) sts, turn [12 (12:12:13) sts]

Row 2 (WS) Ch1, st in bl of each st across, turn.

Row 3 Ch1, ss in fl of each st to final 2 sts, (ss2tog), turn. [11 (11:11:12} sts]

Rep Rows 2-3 another 5 (5:5:6) times. [6 (6:6:6} sts]

Next row As Row 2

Do not fasten off

RIGHT STRAP

Row 1 (RS) Ch1, ss in fl of each st across, turn.

Row 2 (WS) Ch1, ss in bl of each st across, turn.

Rep Rows 1-2 another 14 (14:15:15) times. Line up the Strap with the right-hand side of Back Shaping and ss seam together.

FRONT LEFT SHAPING

With RS facing, join yarn in marked st after Row 1 of Back Shaping.

Row 1 (RS) Ch1, ss in fl of each st to end, turn.

[12(12:12:13) sts}

Row 2 (WS) Ch1, ss in bl of each st across, turn.

Row 3 (Working in fl only), (ss2tog) first 2 sts, ss in each st to end, turn. [11(11:11:11) sts}

Rep Rows 2-3 another 5 (5:5:6) times.

[6(6:6:6)sts]. Do not fasten off.

LEFT STRAP

Work a Right Strap and join to top left-hand side of Back Shaping.

TO FINISH

WIDTH a:

20 (21:22.5:24)cm
7 3/4 (8 1/4 : 8 3/4 : 9 1/2) in

LENGTH b:

29 (30:31.5:32.5)cm
11 1/2 (11 3/4 : 12 1/2 : 12 3/4) in

Weave in all ends. Using the image as a guide, sew 4 buttons across each long edge of Back. This edge should be wrapped around the front and the buttons should be secured through the Front Bib.

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