A beanie is a flat-topped hat you can finish in a weekend

A beanie starts with a tube of ribbed fabric, then narrows at the crown until you close the top with a drawstring. The whole project takes 6 to 10 hours of actual knitting time, depending on yarn weight and your speed. You'll use only two needles, one stitch pattern (usually knit and purl in alternation), and a single ball of yarn—making it one of the easiest hat shapes to complete.

The basic path is: cast on stitches in a circle, knit the ribbed cuff straight for 2 to 3 inches, switch to stockinette stitch (all knit stitches) for the body, then decrease stitches in rounds until you have 6 to 8 stitches left. Thread the yarn through those final stitches, pull tight, and weave in the ends. A beanie fits most adult heads and works in any yarn weight from fingering to bulky.

Key Takeaways

  • Cast on 80 to 100 stitches using circular needles or double-pointed needles, depending on your yarn weight and desired fit.
  • Knit the ribbed cuff (alternating knit and purl stitches) for 2 to 3 inches before switching to stockinette stitch for the body.
  • Decrease stitches in the crown by knitting two stitches together at regular intervals every few rounds until you have 6 to 8 stitches remaining.
  • Cut the yarn, thread it through the final stitches with a tapestry needle, pull tight to close the top, and weave in loose ends.

Choosing needles and yarn weight

Circular needles work best for beanies because they hold many stitches without crowding. Use a 16-inch circular needle for most adult hats. If your yarn is very thin (fingering weight), you may need a 12-inch needle; if it's very thick (bulky), a 20-inch needle gives you more room. The needle size should match the yarn label's recommendation—usually printed on the ball band.

Yarn weight determines how many stitches you cast on and how tall your finished hat will be. Worsted weight (medium thickness) is the easiest starting point: cast on 88 to 100 stitches for an average adult head. Bulky yarn needs fewer stitches (60 to 80) because each stitch is wider. Fingering weight needs more (100 to 120). Check the yarn label for the recommended needle size and gauge (stitches per inch), then adjust your cast-on number if needed.

Casting on and starting the cuff

Use the long-tail cast-on method, which creates a neat, stretchy edge that won't roll. Measure out a tail about three times the length of your desired cast-on width—roughly 3 feet for a beanie. Tie a slip knot, place it on your needle, then use your thumb and index finger to hold the two yarn strands and create loops. This takes practice, but YouTube videos show the hand position clearly. Cast on your target number of stitches (88 to 100 for worsted weight) and join to knit in the round.

Once joined, knit the cuff in ribbing: alternate knit one stitch, purl one stitch all the way around. Repeat this pattern for 2 to 3 inches. The ribbing should feel snug and elastic—this is what holds the beanie on your head. Count your rounds by marking every tenth round with a stitch marker or a piece of contrasting yarn. After 2 to 3 inches (roughly 12 to 18 rounds in worsted weight), switch to stockinette stitch: knit every stitch, every round, with no purling.

Knitting the body and shaping the crown

Knit stockinette stitch straight for 5 to 6 inches from the end of the cuff. This is the main body of the hat and requires no shaping—just knit every round the same way. The fabric will curl slightly at the edges, but the ribbed cuff you already made will hold it flat. Use stitch markers to mark every 10 or 20 stitches so you don't lose count.

When the body reaches 5 to 6 inches, begin the crown decreases. The goal is to narrow the hat so it closes at the top. A common decrease pattern is: knit 8 stitches, then knit two stitches together (insert your needle through two stitches at once and knit them as one). Repeat this pattern all the way around. After this round, you'll have about 10 percent fewer stitches. Knit one plain round with no decreases, then repeat the decrease round. Keep alternating: one round of decreases, one plain round, until you have 6 to 8 stitches left. This usually takes 4 to 6 decrease rounds.

Closing the top and finishing

When you have 6 to 8 stitches left on your needle, cut the yarn, leaving a 6-inch tail. Thread the tail onto a tapestry needle (a blunt needle with a large eye). Pass the tapestry needle through each remaining stitch on the knitting needle, sliding them off as you go. Pull the yarn tight to gather the stitches and close the hole at the crown. Tie a knot on the inside of the hat to find the closure.

Weave in all loose ends—the cast-on tail, the yarn tail from the crown closure, and any ends from color changes if you used more than one yarn. Use the tapestry needle to thread each tail through nearby stitches on the inside of the hat, running it back and forth for about an inch. Trim any remaining tail close to the fabric. Wash the finished beanie in cool water with mild soap, squeeze out water gently (do not wring), and lay it flat to dry. It will relax and settle into its final shape.

Common mistakes and how to avoid them

Casting on too few stitches makes the hat too small and tight. If your beanie feels snug after the cuff is done, you cast on too few. Count your stitches after joining to the round—you should have exactly the number you intended. If you're off by more than two stitches, start over.

Losing track of rounds is straightforward when knitting in the round because there's no row end to mark progress. Place a stitch marker at the start of each round and move it up as you knit. Mark every 10 rounds with a piece of contrasting yarn threaded through a stitch so you can count backward if you lose your place.

Decreasing too fast creates a pointy crown instead of a flat top. Space your decrease rounds at least one plain round apart. If the crown looks too sharp, you decreased too aggressively—the hat will still work, but it won't sit as flat on the head.

Twisting the cast-on happens when you join to knit in the round but the stitches are twisted around the needle. Before you knit the first stitch, lay the needle flat and make sure all cast-on stitches face the same direction. If they're twisted, pull out the join and redo it.

Adjusting the fit for different head sizes

The cast-on number changes the finished width. For a child's head, cast on 70 to 80 stitches in worsted weight. For a large adult head, cast on 100 to 110 stitches. The cuff length also affects fit: a longer cuff (3 to 4 inches) will fold down and cover more of the ears, while a shorter cuff (1.5 to 2 inches) sits higher on the head. Measure a beanie that fits the intended wearer and count how many inches around it is, then divide by the gauge on your yarn label to find your cast-on number.

The body length (stockinette section before decreases) can also be adjusted. A longer body (6 to 7 inches) creates a slouchy beanie that drapes down the back of the neck. A shorter body (4 to 5 inches) creates a fitted beanie that sits closer to the head. Measure from the top of the wearer's head to where you want the hat to end, subtract the cuff length, and that's your target body length.

Frequently Asked Questions

What if I drop a stitch in the middle of knitting?

Stop knitting when ready and use a crochet hook to pick up the dropped stitch. Insert the hook through the loop from front to back, catch the horizontal strand of yarn above it, and pull the strand through the loop. Repeat this for each row the stitch dropped through, then place the stitch back on your knitting needle. If you don't notice until several rows later, you can still fix it, but it takes more patience.

Can I knit a beanie with straight needles instead of circular needles?

Yes, but you'll knit flat and seam the sides together at the end. Cast on half your target stitches (44 to 50 for worsted weight), knit in rows instead of rounds, and when the piece is long enough, bind off and sew the two long edges together with a tapestry needle. This method is slower because seaming takes extra time, but it works if you only have straight needles.

How do I know when to start decreasing?

Measure the hat on the wearer's head or on a head-shaped form. The body should reach from the top of the head to about an inch above the ears. For most adults, that's 5 to 6 inches of stockinette stitch. If you're unsure, knit a bit longer—you can always decrease more rounds, but you can't add length once you've closed the crown.

What yarn weight is best for a beginner?

Worsted weight or bulky weight is easiest because the stitches are large and straightforward to see. Avoid fingering weight for your first beanie—the stitches are tiny and mistakes are harder to spot. Acrylic yarn is also forgiving because it doesn't split easily and you can pull out and reknit without damaging the fibers.

Do I need to block the beanie after I finish it?

Blocking (wetting and shaping the finished hat) helps even out stitches and relax the fabric. Wash the beanie in cool water with mild soap, squeeze out excess water gently, and lay it flat on a towel to dry. You can shape it over a bowl or head form while it dries if you want a specific fit, but blocking is optional—the beanie will work without it.