Start with yarn weight and needle size that match

A knit blanket works best when you pick yarn and needles that go together. Yarn comes in weights from thin (fingering) to thick (bulky), and each weight has a recommended needle size printed on the label. For a first blanket, worsted weight yarn (medium thickness) and US size 8 to 10 needles are forgiving — the stitches are large enough to see and fix, and the blanket grows fast enough to stay interesting.

Buy yarn in a solid color or straightforward pattern rather than variegated (multi-colored). Solid yarn lets you see your stitches clearly, which matters when you are learning. A typical throw blanket needs 1,500 to 2,000 yards of yarn, which is roughly 6 to 8 skeins of worsted weight. Check the yardage on each skein label and add them up before you buy.

Key Takeaways

  • Worsted weight yarn and US size 8 to 10 needles are the easiest starting point because stitches are visible and the blanket grows quickly.
  • A garter stitch blanket (knit every row) requires no pattern reading and teaches you the basic motion without complexity.
  • Cast on 100 to 120 stitches to get a blanket width of roughly 36 to 44 inches, which is a usable throw size.
  • Expect 20 to 40 hours of knitting time depending on yarn weight and how fast your hands move.
  • Keep the first and last stitch loose and consistent so the edges stay even and don't curl.

Cast on using the long-tail method

Casting on means creating the first row of loops on your needle. The long-tail cast-on is the standard method for blankets because it creates a neat, stretchy edge that does not curl. You will need a length of yarn roughly three times the width you want your blanket to be. For a 40-inch blanket, measure out about 120 inches of yarn before you start.

Make a loop with the yarn, hold it with your thumb and forefinger, and pull the working yarn (the end attached to the skein) through the loop. Repeat this motion, moving your thumb and forefinger to create new loops, until you have the number of stitches you need. For a throw blanket, cast on 100 to 120 stitches. If you have never done this before, watch a video of the motion first — it is easier to learn by watching hands move than by reading steps.

Knit every row in garter stitch

Garter stitch is the simplest stitch pattern: you knit every row, every stitch, from start to finish. This creates a bumpy texture that looks the same on both sides. There is no pattern to read, no increases or decreases to track, and no way to accidentally switch to a different stitch by mistake.

Hold the needle with cast-on stitches in your left hand. Insert the right needle through the first stitch from left to right, wrap the yarn around the right needle, and pull it back through the stitch. Slip the old stitch off the left needle. Repeat across the row until all stitches are on the right needle. Then switch the needles and knit the next row the same way. The rhythm becomes automatic after a few rows.

Keep edges even by staying consistent

The first and last stitch of every row set the tone for how neat your edges look. Slip the first stitch of each row without knitting it — insert the needle as if to knit, then move it to the right needle without wrapping yarn. This creates a chain-like edge that stays even. Knit the last stitch normally.

Keep your tension (how tight you pull the yarn) the same throughout. Tension that is too tight makes the blanket stiff and hard to knit; too loose makes it floppy. Aim for stitches that are snug but not strangled. Your tension will improve naturally as your hands learn the motion, so do not worry about perfection in the first few rows.

Bind off when the blanket reaches your target size

Binding off secures the final row so stitches do not unravel. A blanket is usually done when it measures roughly 40 to 50 inches wide and 50 to 60 inches long, though you can make it any size you want. Measure your blanket with a tape measure laid flat, not stretched.

To bind off, knit two stitches. Insert the left needle through the first stitch on the right needle and pull it over the second stitch and off the needle. Knit one more stitch and repeat. When one stitch remains, cut the yarn, pull the tail through the loop, and tighten. Weave the tail through the edge stitches with a yarn needle to hide it.

Block the blanket to even out the edges

Blocking means wetting the finished blanket and laying it flat to dry, which evens out uneven stitches and relaxes the fabric. Soak the blanket in cool water with a gentle wool wash (or regular shampoo) for 15 minutes. Squeeze out water gently — do not wring. Lay it flat on a clean towel or blocking board, smooth it into shape, and let it dry completely, which takes 24 to 48 hours.

Blocking is optional but worth doing, especially if your edges are wavy or your stitches look uneven. It transforms a rough-looking blanket into something that looks intentional and finished.

Troubleshoot common problems as you go

If you accidentally drop a stitch (a loop falls off the needle), pick it up right away with a crochet hook before it unravels down multiple rows. Insert the hook through the dropped loop from front to back, catch the horizontal strand above it, and pull it through. Repeat for each row the stitch fell through, then place the loop back on the knitting needle.

If you knit too many or too few stitches in a row, the blanket will get wider or narrower. Count your stitches every few rows to catch this early. If you realize a mistake several rows back, you can frog (rip back) to that point and start over, or you can leave it — small mistakes disappear in the finished blanket and are invisible to anyone but you.

Frequently Asked Questions

How long does it take to knit a blanket?

A throw-sized blanket in worsted weight yarn takes roughly 20 to 40 hours of actual knitting time. This depends on how fast your hands move and how often you knit. If you knit for an hour a day, expect 3 to 6 weeks. If you knit a few hours a week, it will take 2 to 3 months.

What if I make a mistake in the middle of a row?

If you notice the mistake right away, drop back one stitch, fix it with a crochet hook, and keep going. If you do not notice until several rows later, you can frog back to that point and reknit, or you can leave it. Most mistakes are invisible in the finished blanket and only you will know they are there.

Can I use a different stitch pattern instead of garter stitch?

Yes, but garter stitch is the easiest for a first blanket because it requires no pattern reading. Once you finish one blanket, you can try stockinette stitch (knit one row, purl one row) or straightforward patterns like seed stitch. Start with garter to build confidence.

Do I need to wash the blanket when it is done?

A gentle wash in cool water with wool wash removes dust and oils from handling. Lay it flat to dry. Blocking (wetting and drying flat) also evens out stitches. Neither is required, but both make the finished blanket look more polished.

What if the blanket edges curl or look wavy?

Wavy edges usually mean tension changed as you knitted, or the first and last stitches were too tight. Blocking flattens most waviness. For future blankets, slip the first stitch and keep the last stitch loose. If edges still curl after blocking, garter stitch edges are less prone to curling than stockinette.