A crocheted hat is one of the most rewarding projects for a new stitcher because it works up quickly and results in a wearable, practical item. This guide walks you through a classic half double crochet beanie from the first loop to the final stitch.
How a Crochet Hat Works
Most basic beanies are constructed from the top down. You begin at the crown with a small circle and increase stitches evenly in each round until the circle matches the circumference of the head. Once the crown is wide enough, you stop increasing and continue stitching straight down to create the body of the hat. This simple geometry, flat circle followed by a tube, is the foundation for nearly every beanie pattern you will encounter.
Hat Size Chart
Getting the right fit starts with knowing the measurements for your intended recipient. The numbers below represent average head circumferences and the corresponding hat dimensions. Remember that a hat needs negative ease, meaning the finished hat circumference should be 1 to 2 inches smaller than the actual head measurement, so it stays put without slipping.
- Preemie: Head 12 in / Hat Circumference 10-11 in / Crown Diameter 3.25 in / Hat Height 4.5 in
- Newborn (0-3 mo): Head 14 in / Hat Circumference 12-13 in / Crown Diameter 4 in / Hat Height 5.5 in
- Baby (3-12 mo): Head 16 in / Hat Circumference 14-15 in / Crown Diameter 4.75 in / Hat Height 6.5 in
- Toddler (1-3 yr): Head 18 in / Hat Circumference 16-17 in / Crown Diameter 5.5 in / Hat Height 7 in
- Child (3-10 yr): Head 20 in / Hat Circumference 18-19 in / Crown Diameter 6 in / Hat Height 7.5 in
- Teen/Small Adult: Head 21 in / Hat Circumference 19-20 in / Crown Diameter 6.5 in / Hat Height 8 in
- Medium/Large Adult: Head 23 in / Hat Circumference 21-22 in / Crown Diameter 7 in / Hat Height 8.5-9 in
For a comprehensive guide on standard sizing across all ages, the Craft Yarn Council publishes detailed measurement charts used industry-wide.
What You’ll Need
- Yarn: Worsted weight (Category 4) acrylic, wool, or blend. Approximately 150-200 yards for an adult size.
- Hook: US H-8 (5.0 mm) or size needed to obtain gauge.
- Notions: Yarn needle for weaving ends, stitch marker (optional but helpful), scissors.
If you are unsure which fiber to choose, our roundup of the best yarns for crochet hats breaks down warmth, washability, and stitch definition by material.
Gauge
Gauge ensures your hat matches the size chart. For this pattern, aim for 13 half double crochet stitches and 10 rows equaling 4 inches in the round. If your circle is too wide, go down a hook size. If it is too narrow, go up a hook size. Taking ten minutes to make a gauge swatch saves hours of frogging later. If you are new to checking tension, read our tutorial on how to measure crochet gauge accurately.
The Pattern: Simple Half Double Crochet Beanie
This pattern is written for an Adult Medium/Large (21-22 inch circumference). Instructions for modifying sizes follow in the next section. Chain 2 at the start of rounds does not count as a stitch. Join each round with a slip stitch to the first half double crochet.
The Crown
The crown is a flat circle created by increasing stitches in a predictable pattern. Place a stitch marker in the first stitch of each round to keep your place.
- Round 1: Ch 2, 8 hdc in 2nd ch from hook. Join. (8 sts)
- Round 2: Ch 2, 2 hdc in each st around. Join. (16 sts)
- Round 3: Ch 2, *hdc in next st, 2 hdc in next st* repeat * to * around. Join. (24 sts)
- Round 4: Ch 2, *hdc in next 2 sts, 2 hdc in next st* repeat * to * around. Join. (32 sts)
- Round 5: Ch 2, *hdc in next 3 sts, 2 hdc in next st* repeat * to * around. Join. (40 sts)
- Round 6: Ch 2, *hdc in next 4 sts, 2 hdc in next st* repeat * to * around. Join. (48 sts)
- Round 7: Ch 2, *hdc in next 5 sts, 2 hdc in next st* repeat * to * around. Join. (56 sts)
- Round 8: Ch 2, *hdc in next 6 sts, 2 hdc in next st* repeat * to * around. Join. (64 sts)
Stop increasing when the crown diameter measures roughly 7 inches (or the diameter listed in the size chart for your size). Measure across the center of the flat circle. If you need a larger hat, continue the increase pattern (hdc in next 7 sts, 2 hdc in next st, etc.) until you hit the target diameter.
The Body
Once the crown is wide enough, the increases stop. You will now work one half double crochet in every stitch around for every subsequent round. This creates the vertical sides of the hat.
- Round 9 and beyond: Ch 2, hdc in each st around. Join.
Repeat the body round until the hat measures the target height from the center of the crown to the bottom edge (approx 8.5-9 inches for Adult Medium/Large). Try it on as you go; the fabric stretches slightly with wear.
The Brim (Optional)
A ribbed brim adds elasticity and a polished look. You can work this directly onto the bottom edge or separately and sew it on. For an attached ribbed brim:
- Turn the hat so the bottom edge faces you. Join yarn in any stitch.
- Round 1: Ch 1, *sc in next st, sc in next st* around (or work evenly). Join.
- Round 2: Ch 1, *fpdc around next st, bpdc around next st* repeat around. Join.
- Repeat Round 2 for 1.5 to 2 inches.
- Fasten off invisibly.
Front post and back post double crochet (fpdc/bpdc) create the vertical ribs. If those stitches are new to you, our guide to post stitches includes photo tutorials.
Modifying for Other Sizes
To customize the pattern for any size on the chart, change only two variables: the final crown diameter and the total body length.
- Crown: Continue the increase rounds (adding one more plain stitch between increases each round) until the flat circle matches the “Crown Diameter” in the chart.
- Body: Work even (one hdc per stitch) until the piece measures the “Hat Height” from the center of the crown.
For a slouchy fit, add 1.5 to 2 inches to the body height before starting the brim. For a fitted beanie, stick to the chart height exactly.
Yarn Options for Hats
Worsted weight is the standard for learning because the stitches are easy to see and count. However, fiber choice changes the drape and warmth of the finished hat.
- Acrylic: Budget-friendly, machine washable, hypoallergenic. Great for kids and charity donations.
- Superwash Wool: Warm, breathable, machine washable. Excellent for winter wear.
- Cotton Blend: Lightweight, cool, good structure. Ideal for spring or summer hats.
- Bulky Weight (Category 5): Works up twice as fast. Use a larger hook (US J-10 / 6.0 mm or K-10.5 / 6.5 mm) and fewer rounds. Perfect for last-minute gifts.
Avoid slippery novelty yarns or very fuzzy textures for your first hat; they make it difficult to see your stitches and count accurately.
Troubleshooting Common Hat Problems
Even experienced crocheters run into shape issues. Here is how to diagnose and fix the most frequent complaints.
The Crown Is Pointy, Not Round
A pointed crown usually means your increases are stacking directly on top of each other rather than staggering. Ensure you are shifting the increase position each round (e.g., Round 3 increases fall between Round 2 increases). Also check that you are not accidentally adding extra stitches in the join area. Count your stitches at the end of every increase round.
The Crown Is Ruffling
Ruffling or waviness at the crown edge indicates too many increases. You are adding stitches faster than the fabric can lay flat. Frog back to the last round that lay flat, then slow the increase rate. Instead of increasing every round, work one plain round between increase rounds until the diameter is correct.
The Hat Is Too Small
If the hat won’t go over the head, the crown diameter was likely too small, or your gauge is tighter than the pattern. You can add a round or two of increases to widen the crown if you haven’t started the body yet. If the body is already done, you can add a ribbed brim with a larger hook to add a little stretch, but the best fix is ripping back to the crown and increasing further.
The Hat Is Too Big
A hat that slips over the eyes usually has a crown that is too wide or a body that is too long. Check your gauge; loose