3 Sizes: Crochet Pattern Shamrock Hat (free & easy)

This Shamrock Clover Hat crochet pattern is worked flat from the bottom up in rows of half double crochet (HDC). The pattern is written for three sizes: toddler, child & adult. You can follow the written instructions or download & print the picture graph to follow along to.

Post contains affiliate links. See our Privacy Policy for more information.

Don’t be intimidated by the color changes. Since this is a hat, you can simply weave all your ends to the “wrong side” and then tie and trim them. I didn’t take the time to weave every end in. Why bother? You’re not going to see them!

I apologize for some of the photo quality. I was working in the evening and couldn’t get the best photos. But I figure a less than perfect photo is more helpful than no photo.

Did you make this hat? Tag me on Instagram (lovable_loops) or Facebook to share your pictures with me!

Sizes

Toddler, Child & Adult

Gauge

16 half double crochet = 4 inches

14 rows = 4 inches

PLEASE make a gauge swatch before you begin. Our individual tensions and the thickness of worsted weight yarns can vary greatly.

This is the hat size guide that I use to design my hats. This guide was made by Jeanne Steinhilber for The Crochet Crowd. You can read the original post here.

hdc= half double crochet
sc= single crochet
ch= chain
ch(s)= chains
st= stitch
st(s)= stitches
rem= remaining
hdc2tog= half double crochet 2 stitches together

When you are changing colors, use the new color to do the final pull through of the stitch that is the old color.
Pattern is worked back and forth in rows of half double crochet (hdc) from the bottom up.
You can print and follow the pixel graph or follow the written instructions.
Chain 2 at the beginning of each row.
The brim is worked flat and sewn onto the hat.

Crochet hook: I used an H 5mm hook. Please make your gauge to determine what hook size you need.
Yarn: I used Red Heart Super Saver in Paddy Green & White

Click here to download the Toddler Size pixel graph.

← Row 1: white x 32, green x 1, white x 8, green x 1, white x 30
→ Row 2: white x 29, green x 3, white x 5, green x 4, white x 31
← Row 3: white x 30, green x 5, white x 4, green x 2, white x 31
→ Row 4: white x 32, green x 2, white x 2, green x 6, white x 30
← Row 5: white x 28, green x 8, white x 1, green x 2, white x 33
→ Row 6: white x 29, green x 3, white x 2, green x 1, white x 1, green x 9, white x 27
← Row 7: white x 27, green x 10, white x 1, green x 6, white x 28
→ Row 8: white x 28, green x 16, white x 28
← Row 9: white x 29, green x 15, white x 28
→ Row 10: white x 28, green x 11, white x 33
← Row 11: white x 30, green x 6, white x 1, green x 6, white x 29
→ Row 12: white x 28, green x 7, white x 1, green x 7, white x 29
← Row 13: white x 28, green x 9, white x 1, green x 6, white x 28
→ Row 14: white x 29, green x 4, white x 2, green x 9, white x 28
← Row 15: white x 29, green x 8, white x 35
→ Row 16: white x 35, green x 7, white x 30
← Row 17: white x 32, green x 5, white x 35
→ Row 18: white x 36, green x 2, white x 34

Use your tapestry needle to sew up the back seam.

Join your yarn to the top of the hat (make sure your heart isn’t upside down!). You are now going to work in the round.

Instructions between two asterisks (*) should be repeated for the remainder of the round.

Rnd 1: ch 2, *hdc2tog*, join [36]

Rnd 2: ch 2, hdc2tog, join [18]

Fasten off leaving a long tail for sewing.

Use your tapestry needle to sew the top shut.

Brim instructions are further down.

Crochet hook: I used an H 5mm hook. Please make your gauge to determine what hook size you need.
Yarn: I used Red Heart Super Saver in Paddy Green & White

Click here to download the Child Size pixel graph.

← Row 1: white x 34, green x 1, white x 8, green x 1, white x 32
→ Row 2: white x 31, green x 3, white x 5, green x 4, white x 33
← Row 3: white x 32, green x 5, white x 4, green x 2, white x 33
→ Row 4: white x 34, green x 2, white x 2, green x 6, white x 32
← Row 5: white x 30, green x 8, white x 1, green x 2, white x 35
→ Row 6: white x 31, green x 3, white x 2, green x 1, white x 1, green x 9, white x 29
← Row 7: white x 29, green x 10, white x 1, green x 6, white x 30
→ Row 8: white x 30, green x 16, white x 30
← Row 9: white x 31, green x 15, white x 30
→ Row 10: white x 30, green x 11, white x 35
← Row 11: white x 32, green x 6, white x 1, green x 6, white x 31
→ Row 12: white x 30, green x 7, white x 1, green x 7, white x 31
← Row 13: white x 30, green x 9, white x 1, green x 6, white x 30
→ Row 14: white x 31, green x 4, white x 2, green x 9, white x 30
← Row 15: white x 31, green x 8, white x 37
→ Row 16: white x 37, green x 7, white x 32
← Row 17: white x 34, green x 5, white x 37
→ Row 18: white x 38, green x 2, white x 36
← Row 19: white x 76

Use your tapestry needle to sew up the back seam.

Join your yarn to the top of the hat (make sure your heart isn’t upside down!). You are now going to work in the round.

Instructions between two asterisks (*) should be repeated for the remainder of the round.

Rnd 1: ch 2, *hdc2tog*, join [38]

Rnd 2: ch 2, hdc2tog, join [19]

Fasten off leaving a long tail for sewing.

Use your tapestry needle to sew the top shut.

Brim instructions are further down.

Crochet hook: I used an H 5mm hook. Please make your gauge to determine what hook size you need.
Yarn: I used Red Heart Super Saver in Paddy Green & White

Click here to download the Adult Size pixel graph.

← Row 1: white x 38, green x 1, white x 8, green x 1, white x 36
→ Row 2: white x 35, green x 3, white x 5, green x 4, white x 37
← Row 3: white x 36, green x 5, white x 4, green x 2, white x 37
→ Row 4: white x 38, green x 2, white x 2, green x 6, white x 36
← Row 5: white x 34, green x 8, white x 1, green x 2, white x 39
→ Row 6: white x 35, green x 3, white x 2, green x 1, white x 1, green x 9, white x 33
← Row 7: white x 33, green x 10, white x 1, green x 6, white x 34
→ Row 8: white x 34, green x 16, white x 34
← Row 9: white x 35, green x 15, white x 34
→ Row 10: white x 34, green x 11, white x 39
← Row 11: white x 36, green x 6, white x 1, green x 6, white x 35
→ Row 12: white x 34, green x 7, white x 1, green x 7, white x 35
← Row 13: white x 34, green x 9, white x 1, green x 6, white x 34
→ Row 14: white x 35, green x 4, white x 2, green x 9, white x 34
← Row 15: white x 35, green x 8, white x 41
→ Row 16: white x 41, green x 7, white x 36
← Row 17: white x 38, green x 5, white x 41
→ Row 18: white x 42, green x 2, white x 40
← Row 19: white x 84
→ Row 20: white x 84

Use your tapestry needle to sew up the back seam.

Join your yarn to the top of the hat (make sure your heart isn’t upside down!). You are now going to work in the round.

Instructions between two asterisks (*) should be repeated for the remainder of the round.

Rnd 1: ch 2, *hdc2tog*, join [42]

Rnd 2: ch 2, hdc2tog, join [21]

Fasten off leaving a long tail for sewing.

Use your tapestry needle to sew the top shut.

Crochet hook: You’ll need to use a crochet hook that gives you a brim that stretches to the following lengths:

Toddler: 19 inches
Child: 20 inches
Adult: 22 inches

I used a H 5mm crochet hook. If your gauge for the hat was different from mine, you may need to use a different hook size for the brim.

Row 1: ch 9, sc in 2nd ch from hook and each rem ch, turn (8)

Row 2: ch 1, sc in each st in the back loops only, turn (8)

Toddler size: repeat row 2 for a total of 72 rows

Child size: repeat row 2 for a total of 76 rows

Adult size: repeat row 2 for a total of 80 rows

Since the brim is green and the hat is white, we need to do a round of single crochet to hide our sewing yarn. Join your Paddy Green yarn to the bottom of the hat, chain 1 and make one single crochet in the bottom of each beginning chain.

Use your tapestry needle to sew the brim to the hat. Each stitch from the hat should be sewn to a row from the brim. The brim will stretch as you go.