Adorable Crochet Baby Bonnet Pattern For Preemie Baby

This is a free crochet baby bonnet pattern for prematurely born babies. However, the pattern construction is simple, so you can easily adjust it yourself.

Super comfortable and super easy to make, this crochet baby bonnet will be your go-to when keeping your little one warm.

The way the crochet bonnet is constructed, there are no seams or bulky elements that would unnecessarily make your little one uncomfortable.

I have designed this cute make for the annual Preemie Crochet Challenge organised by Helen from Sunflower Cottage Crochet.

Helen curated a great collection of crochet patterns that are suitable for prematurely born babies. Throughout the duration of the challenge, you will be able to download free preemie crochet patterns. 

Each download of a pattern is a pledge to make at least one of that item to donate to a NICU, chart or parents of preemie babies directly.

This challenge is designed to send love and support to new parents of a preemie baby. The smallest gesture of bonding squares, or a tiny hat that actually fits can really help!


crochet baby bonnet free pattern

Get the ad-free PDF version of this pattern from my shops below:

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crochet baby bonnet pattern

Preemie Crochet Challenge 2023

There are other great designers taking part in this year’s challenge with amazing patterns that will help to build up a great selection of items sized for a preemie baby.

You can see all the other patterns in the main round up on Helen’s website.

round up button

Secondly, I took part in the Preemie Challenge last year too and designed a very popular Practical Crochet Baby Vest For Premature Babies – Free Pattern.

This blog post contains affiliate links and if you click through them to make a purchase, I will earn a commission. I link these companies and their products because of their quality and service not because of the commission I receive from your purchase.

Materials For Crochet Baby Bonnet


9 sc x 11 rows = 4 x 4 inches / 10 x 10 cm

Crochet Baby Bonnet Finished Size

10 cm height x 9 cm width

Stitches And Abbreviations (US Crochet Terms)

ch- chain stitch

sl st – slip stitch

sc- single crochet

sc blo – single crochet worked through back loop only

hdc – half doublee crochet

hdc tlo – half double crochet worked through third loop only (sometimes called camel stitch)

Crochet Baby Bonnet Pattern Notes

  • the pattern starts with creating the square which is the back of the bonnet
  • you can easily alter the size of this square by adding /subtracting the number of stitches or rows  to make the bonnest smaller or larger
  • then you will pick up hdc stitches around the three sides of the square working around the end sc of each row and the top loops of last row
  • by working the hdc rows you will build up the depth of the bonnet, work more /less rows to make the bonnet smaller or larger
  • the pattern is finished off by short rows of single crochet worked through back loop only for the brim of the bonnet
  • you will also work 3 rows across the bottom edge of the bonnet to shape it around the neck
  • the last part are the ties on each side

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Crochet Baby Bonnet Main Pattern


Chain 15.

Row 1: starting in 2nd ch from the hook, work 1 sc in each st across the foundation chain, turn. [14 sc]

Row 2 – 12: 1 ch (doesn’t count as a stitch here and throughout), 1 sc in each st across. [14 sc]

Fasten off and rejoin yarn around the edge sc of the first row.

Bonnet Body

Row 1: 2 ch (counts as first hdc here and throughout), 1 hdc in each edge sc, 1 hdc in each sc of last row of the square, 1 hdc in each edge sc on the other side, turn. [38 hdc]

Row 2 – 4: 2 ch, 1 hdc tlo in each st across, turn. [38 hdc]

Do not fasten off.

Bonnet Brim

With yarn still attached, chain 6.

Row 1: working into 2nd ch from hook, 1 sc in each ch across the chain just made, sl st to same st on bonnet body, sl st into next st, turn. [5 sc]

Row 2: 1 ch (doesn’t count as a st throughout), 1 sc blo in each st until last, 1 sc in last, turn. [5 sc]

Row 3: 1 ch, 1 sc, 4 sc blo, (sl st into next st on sleeve) twice, turn. [5 sc]

Repeat Rows 2 – 3 across the stitches of bonnet.

Do not fasten off.

Bottom Trim

Work 1 sc across the brim, 1 sc around edge hdc of each row, work 1 sc into each ch on the underside of the foundation ch of the square, then mirror on the other side.  [32 sc]

Row 2 – 3: 1 ch, 1 sc in each st across, turn. [32 sc]

Do not fasten off.


Chain 36, sl st into each ch. Fasten off.

Join on the other side for second tie, chain 36, sl st into each ch. Fasten off.

Sew in all ends.

Final thoughts…

I hope you love this crochet baby bonnet pattern. If you think your crafty friends will like it too, why not share it with them?

Firstly, you can share a direct link to this pattern on your social media. 

If you liked this pattern, you might also like these:

  1. 10 Free Cosy Crochet Hat and Beanie Patterns
  2. 10 Free Crochet Bucket Hat Patterns For All Seasons
  3. Free Textured Crochet Beanie For Women – Marta Hat Pattern

Secondly, do not forget to pin this tutorial to your favorite Pinterest Board so you can easily find it later too.

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About Veronika Cromwell

Hi, I’m Veronika! I design modern and wearable crochet garments, accessories and homewares. Grab your hook and find your next project!

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