What a hood is and how it differs from a regular neckline
A hood is a fabric covering that extends from the neckline up and over the head, usually attached to a sweater, cardigan, or pullover. Unlike a crew neck or V-neck, a hood has depth—it sits away from your head to create a tunnel of fabric—and it requires shaping at the crown so it doesn't bunch or pull.
The basic structure has three parts: two front panels that frame your face, a back panel that covers the crown, and a drawstring channel (optional but common) that runs around the opening. Most hoods are knit flat in pieces and then seamed together, though some knitters work them in the round directly onto the neckline.
The main challenge is getting the crown shaping right so the hood sits smoothly without excess fabric at the top. This guide covers the most straightforward method: knitting a hood as a separate piece and attaching it to an existing neckline.
Key Takeaways
- A hood requires measuring your head circumference and neckline width before you cast on, so the finished hood will fit without gaping or pulling.
- Most hoods are knit flat in two identical front panels and one back panel, then seamed together and attached to the sweater neckline.
- Crown shaping—usually done with decreases every few rows—prevents the hood from bunching at the top of your head.
- Picking up stitches around the neckline and binding off the hood opening together creates a clean, finished edge.
- A drawstring channel is optional but adds function; you knit it by working a few rows of stockinette, then making yarn-over eyelets for the cord to thread through.
Taking measurements and choosing yarn and needles
Start by measuring the circumference of your head at the widest point (usually across the forehead and back of the skull). Write this number down—it is your target finished hood circumference. Also measure the width of your sweater's neckline opening from shoulder seam to shoulder seam.
Your hood should be roughly 1 to 2 inches wider than the neckline so it sits comfortably without pulling. If your neckline is 16 inches wide, aim for a hood that is 17 to 18 inches wide at the opening. The depth (from neckline to crown) is usually 8 to 10 inches for an adult, depending on how much coverage you want.
Use the same yarn weight and needle size as your sweater body. If you are knitting a hood to attach to an existing garment, match the fiber content and color exactly. Grab a stitch gauge swatch in stockinette stitch to confirm your gauge matches the sweater—a mismatch will show at the seams.
Casting on and knitting the front panels
A hood typically has two front panels (left and right) and one back panel. Each front panel is roughly half the width of the finished hood opening. If your hood opening should be 18 inches wide, each front panel is about 9 inches wide at the base.
Cast on enough stitches to reach that width using your gauge. For example, if your gauge is 5 stitches per inch, cast on 45 stitches for a 9-inch panel. Work in stockinette stitch (knit on the right side, purl on the wrong side) for the full depth of the hood—usually 8 to 10 inches. Keep the edges neat by slipping the first stitch of each row and knitting the last stitch firmly.
When you reach the target depth, do not bind off yet. Instead, leave the stitches on the needle or thread them onto a length of yarn. You will join the front panels to the back panel before binding off the opening edge. Repeat this process for the second front panel so you have two identical pieces.
Knitting and shaping the back panel
The back panel is where the crown shaping happens. Cast on the same number of stitches as one front panel and work in stockinette stitch. After every 2 or 3 rows, decrease 2 stitches (one at each end) using a knit-two-together decrease on the right side and a purl-two-together decrease on the wrong side. This creates a gradual taper toward the crown.
Continue decreasing until you have roughly one-quarter of your original stitches left—for a 45-stitch panel, decrease down to about 12 stitches. At that point, work a few rows without decreasing, then bind off the remaining stitches. The back panel should be the same length as the front panels when laid flat.
The decreases create a curved, dome-like shape that prevents the hood from sitting flat and bunchy on top of your head. If your decreases are too aggressive, the hood will be too narrow at the crown; if they are too gradual, it will bag. Aim for a gentle curve that tapers smoothly from the base to the tip.
Seaming the hood panels together
Lay the two front panels side by side with right sides facing up. Using a tapestry needle and matching yarn, seam them together along one long edge using a mattress stitch. This creates the center front seam of the hood. The seam should run from the cast-on edge (the neckline) up to the top.
Next, attach the back panel. Align the cast-on edge of the back panel with the top edges of the two front panels (where you left the stitches on the needle). Seam the back panel to each front panel using mattress stitch, working from the top down toward the neckline. You now have a three-dimensional hood shape.
Weave in any loose ends with a tapestry needle. Try the hood on over your head to check the fit before attaching it to the sweater. It should sit comfortably without pulling or gaping at the neckline opening.
Attaching the hood to the sweater neckline
With the sweater inside-out and the hood inside-out, align the neckline opening of the hood with the neckline edge of the sweater. Pin them together, matching the center front of the hood to the center front of the sweater. Distribute the ease evenly around the neckline so the hood sits symmetrically.
Using a tapestry needle and matching yarn, seam the hood to the neckline using mattress stitch. Work slowly and check the fit as you go. When the seam is complete, turn the sweater right-side out and try it on. The hood should sit smoothly without puckering or pulling.
If you want a drawstring channel, pick up stitches around the inside of the hood opening (the edge closest to your face) and work a few rows of stockinette stitch. On the next row, create eyelets by working yarn-overs spaced evenly around. Bind off, then thread a cord through the eyelets. This lets you tighten the hood opening around your face.
Finishing touches and common fixes
Once the hood is attached, check for any loose seams or gaps. If the neckline seam is puckering, you may have picked up too many stitches when attaching the hood. Carefully undo a few inches of the seam, remove a stitch or two, and re-seam. If the hood is gaping away from the neckline, the opening is too large; you can take in the side seams slightly by re-seaming them closer to the edge.
If the crown feels too bunchy, you may not have decreased enough. Unravel the back panel, work it again with more aggressive decreases, and re-seam. If the hood feels too tight at the top, add a few rows before binding off the back panel so the crown has more room.
Block the finished sweater with the hood attached by pinning it to shape on a blocking board, misting it lightly with water, and letting it dry flat. This helps even out the seams and gives the hood a polished appearance.
Frequently Asked Questions
Can I knit a hood in the round instead of flat?
Yes. Cast on stitches around your neckline using a circular needle, then work upward in the round, decreasing at two points on the back to create the crown shaping. This method eliminates the center-front seam but requires more experience reading decreases in the round. Flat knitting is easier for beginners because you can see your shaping clearly on each row.
What if my sweater neckline is ribbed?
Pick up stitches in the row below the ribbing so the hood sits on stockinette, not rib. The ribbing will frame the hood opening. Alternatively, unravel the ribbing, pick up the live stitches, and knit the hood directly onto them, then re-rib the opening edge if you want a finished look.
How do I prevent the hood from stretching out over time?
Use a yarn with good elasticity and avoid overstretching it while seaming. Block the finished hood gently and let it dry completely before wearing. If the neckline opening stretches, you can carefully pick up the stitches again and re-bind them off more tightly, or add a thin elastic thread to the inside of the seam for support.
What if I want a wider or narrower hood opening?
Adjust the number of cast-on stitches for the front and back panels. A wider opening requires more stitches; a narrower one requires fewer. Recalculate based on your gauge and desired finished width. Test the fit by pinning the hood to the sweater before seaming permanently.
Can I add a lining to the hood?
Yes, though it is an advanced step. After the hood is attached, pick up stitches around the inside of the opening and knit a lining layer in a lighter yarn, decreasing at the crown to match the outer hood shape. Seam the lining to the outer hood at the neckline opening. This adds warmth and a finished interior.