What a loom-knit brim is and why you'd add one

A brim on a loom-knit hat is a flat, folded edge that sits around the bottom and frames your face. You create it by knitting extra rows on the loom after your main hat body is done, then folding that extension down and securing it. The brim gives a hat structure, keeps it from rolling up, and lets you add a finished look without switching to needles or learning a new technique.

Most loom-knit hat patterns either build the brim as you go (by knitting it first, then the crown) or add it after the crown is complete. This guide covers the after-the-fact method, which is simpler if your pattern doesn't include brim instructions or if you want to add one to a hat you've already finished.

Key Takeaways

  • A brim is created by knitting additional rows on your loom after the hat body is done, then folding the extension down and stitching it in place.
  • You'll need to cast on the bottom edge of your finished hat back onto the loom, which requires picking up stitches from the cast-on row or the edge where you bound off.
  • Knit the brim rows (usually 8 to 16 rows, depending on how wide you want the fold) in stockinette stitch or garter stitch, then bind off loosely.
  • Fold the brim down over the outside of the hat and whip-stitch or ladder-stitch it to the hat body to hold it in place permanently.

Picking up stitches from your finished hat

Before you can knit a brim, you need to get your yarn and stitches back onto the loom. If your hat is already bound off, you'll pick up stitches from the cast-on edge at the bottom. If you bound off at the bottom and cast on at the top (a common method), you'll work from the bound-off edge instead.

Use a crochet hook or a small loom hook to pull yarn through each stitch around the bottom edge of your hat. Work your way around the entire circumference, picking up one stitch in each stitch from the original cast-on or bind-off row. Place each picked-up stitch onto the corresponding peg on your loom. If your hat was knit on a round loom, you'll be working around the same loom; if it was knit flat and seamed, you may need to use a smaller loom or adjust your peg spacing.

Count your stitches as you go to make sure you have the same number you started with. Uneven pickup will create a wavy or uneven brim, so take your time and recount before you begin knitting.

Knitting the brim rows

Once all stitches are on the loom, begin knitting in your chosen stitch pattern. Most brims are worked in stockinette stitch (knit stitch on a round loom, or knit and purl alternating rows on a flat loom) or garter stitch (knit every row). Stockinette creates a smooth, drapey brim; garter stitch is thicker and holds its shape better.

Knit between 8 and 16 rows, depending on how deep you want the brim to be when it's folded. A typical brim folds in half, so if you knit 12 rows, you'll have a brim about 6 rows deep when folded. Thinner yarn and smaller looms may need fewer rows; bulkier yarn may need more. If you're unsure, knit 10 rows and check the length against your hat before continuing.

Keep your tension consistent throughout the brim rows. Loose tension here will make the brim floppy; tight tension will make it difficult to fold and stitch down. Aim for the same tension you used for the hat body.

Binding off and preparing to fold

Once you've knit your desired number of brim rows, bind off all stitches loosely. A loose bind-off prevents the edge from puckering when you fold the brim down. Use the standard loom-knit bind-off method: pull each stitch over the peg above it, working your way around the loom until only one stitch remains. Cut your yarn, pull it through the final stitch, and weave in the end.

Before folding, lay your hat flat on a table with the brim rows extending outward. The brim should lie flat without bunching. If it curls or waves, gently steam it or wet-block it by pinning it flat and letting it dry. This makes the fold cleaner and easier to stitch.

Folding and stitching the brim down

Fold the brim extension down and to the outside of the hat, so the bound-off edge meets or sits just below the original cast-on or bind-off line. The fold should be even all the way around. Use a whip stitch or ladder stitch to find the brim to the hat body, working from the inside if possible so stitches don't show on the outside.

Thread a tapestry needle with yarn that matches your hat. Starting at a seam or an inconspicuous spot, insert the needle under one loop of the hat body, then under one loop of the brim edge, and pull the yarn snug. Move about a quarter-inch along the edge and repeat. Work your way all the way around the hat, keeping stitches small and even.

After you've stitched all the way around, weave in any remaining yarn ends. Try the hat on and check that the brim sits evenly and doesn't pull or bunch. If one section is too tight, you can carefully remove a few stitches, adjust the brim, and re-stitch.

Fixing common brim problems

If your brim is wavy or uneven, the most common cause is uneven stitch pickup at the beginning. If you catch this before stitching it down, you can pick up stitches again and re-knit. If you've already stitched it, you can carefully cut the stitches holding the brim, re-block it, and stitch it down again with more even tension.

If the brim is too stiff or too floppy, the issue is usually yarn weight or stitch choice. A thicker yarn or garter stitch will be stiffer; a thinner yarn or stockinette will be drapier. For future hats, adjust your yarn or stitch pattern based on how this brim feels. If you've already finished, you can't easily change it, but you now know what to do differently next time.

If the brim pulls the hat out of shape, your bind-off was too tight or your stitches are too close together. Loosen your tension on the next hat, or use a slightly larger loom for the brim rows only.

Brim variations and alternatives

A rolled brim is created by knitting extra rows and letting the edges curl naturally instead of folding and stitching. This works best with stockinette stitch and creates a casual, textured look. straightforward bind off and let the brim curl on its own—no stitching required.

A ribbed brim adds stretch and a fitted look. Instead of stockinette or garter, alternate knit and purl stitches in a 1x1 or 2x2 rib pattern for the brim rows. Ribbed brims hug the head and are popular on winter hats. They take slightly longer to knit but wear well and hold their shape through many washes.

If you want a double-layer brim for extra warmth, knit twice as many rows as usual, fold it in half, and stitch the folded edge to the hat body instead of the bound-off edge. This creates a thick, insulating brim with no raw edges showing.

Frequently Asked Questions

Can I add a brim to a hat I finished months ago?

Yes. Pick up stitches from the cast-on edge, knit your brim rows, and stitch it down. The only challenge is matching yarn color and weight if you don't have the original yarn. If the colors don't match exactly, a contrasting brim can look intentional and stylish.

What if I picked up the wrong number of stitches?

If you're off by one or two stitches, you can usually knit the brim anyway—the difference won't be noticeable. If you're off by more than that, pick up stitches again and recount. It's faster to redo the pickup than to knit a brim that doesn't fit evenly.

How do I know if my brim is the right width?

Fold the brim in half and hold it against your face. It should cover your forehead and ears comfortably without blocking your vision. If it's too narrow, knit more rows before binding off. If it's too wide, you can trim it slightly before stitching, though this is harder to undo.

Do I have to stitch the brim down, or can I glue it?

Stitching is more durable and washable. Fabric glue can work for a temporary hold, but it will eventually wear away and may leave stiff spots. Stitching takes longer but lasts through many wears and washes.

What's the difference between picking up stitches and casting on new ones?

Picking up stitches uses the existing loops from your finished hat, so the brim connects smoothly to the hat body. Casting on new stitches creates a separate edge that can look bulky or disconnected. Always pick up stitches for a brim that looks like it was part of the original hat.