What picking up stitches means and when you need it

Picking up stitches means using your working yarn and needle to create new loops along an existing edge — usually the side of a finished piece, a cast-off edge, or around a neckline. You are not unravelling anything. You are anchoring your needle into the fabric itself and drawing yarn through to form stitches you can then knit into.

You pick up stitches when you need to add fabric perpendicular to what you have already made. Common situations include knitting a collar after the body is done, adding sleeves to a finished armhole, picking up stitches along a button band, or knitting a border around the edge of a blanket. The alternative — seaming pieces together — leaves a visible seam line. Picking up stitches creates a neater join.

The challenge is that the number of stitches you pick up must match the number of rows or cast-off stitches along that edge, or your new section will pucker, stretch, or twist. Getting this ratio right is the main skill.

Key Takeaways

  • You pick up stitches by inserting your needle under the edge loops of finished fabric and drawing yarn through to create new stitches on your needle.
  • The standard ratio is one picked-up stitch for every row on a vertical edge, but you may need to skip one row every few rows to prevent bunching.
  • Mark your starting point and count as you go, because miscounting early is easier to fix than discovering a mismatch halfway through.
  • Use a needle one size smaller than your working needle to keep picked-up stitches tight and prevent holes along the join line.

Finding the right number of stitches to pick up

Before you pick up a single stitch, you need to know how many to pick up. If you are picking up along a cast-off edge, count the cast-off stitches — that is your number. If you are picking up along a vertical edge (the side of your knitted fabric), count the rows instead.

For a vertical edge, the standard starting point is one picked-up stitch per row. However, knit stitches are taller than they are wide, so picking up one stitch per row often creates too many stitches and causes the new section to bunch or wave. Most knitters pick up three stitches for every four rows, or five stitches for every six rows. Test this on a swatch first if you are unsure — knit a small rectangle, then pick up stitches along one side using the three-for-four ratio and see how it looks.

Write down your target number before you start. Mark the beginning and end of the edge with safety pins or scrap yarn so you can divide the edge into sections and pick up evenly across the whole length. If your edge is 60 rows and you are using a three-for-four ratio, you need 45 picked-up stitches. Divide the 60 rows into five sections of 12 rows each, then pick up nine stitches in each section.

The mechanics of picking up a stitch

Hold your finished piece in your left hand with the edge you are picking up facing toward you. Insert your working needle from front to back under the loop at the edge of your fabric — usually the first stitch of a row on a vertical edge, or under the bump of a cast-off stitch on a horizontal edge. The needle should go under one complete loop, not split the yarn.

Once your needle is through, wrap your working yarn around the needle the same way you would for a regular knit stitch, then draw the yarn back through the loop toward you. You now have one new stitch on your needle. Repeat this motion along the entire edge, moving down one row (or across one stitch) each time.

The most common mistake is going too deep into the fabric or splitting the yarn of the edge stitch. Stay close to the very edge and aim for the loop that sits just inside the selvage — the outermost column of stitches. If you go too far in, your new stitches will be loose and create holes.

Using the right needle size and yarn tension

Use a needle one size smaller than the needle you used for the main piece. This keeps your picked-up stitches tight and prevents the join from looking loose or creating a line of holes. Once you have all your stitches picked up and have knitted a few rows, you can switch back to your regular needle size if the pattern calls for it.

Keep your yarn tension even as you pick up. Pulled too tight, the edge will pucker and curl. Too loose, and the stitches will be uneven and the join will look sloppy. Aim for the same tension you use for regular knitting — the yarn should flow smoothly from your working ball without you having to tug or ease it.

If you are picking up a large number of stitches, your working yarn may not be long enough. Leave a tail at least three times the length of the edge you are picking up. If you run out of yarn before you finish, tie on a new length and weave in the ends later.

Picking up stitches on different edges

A vertical edge (the side of your knitted piece) requires the three-for-four or five-for-six ratio because rows are taller than stitches are wide. Insert your needle under the loop that sits between the first and second stitch of each row, going from front to back. This loop is easier to see and less likely to split than the edge stitch itself.

A horizontal edge (a cast-off or cast-on edge) is simpler: pick up one stitch for each cast-off stitch. Insert your needle under the bump of yarn that sits just below the cast-off edge. You can see these bumps clearly, and there is one per stitch, so counting is straightforward.

A curved edge (like an armhole or neckline) combines both. The curved section has both vertical and horizontal components. Pick up stitches along the vertical parts using the three-for-four ratio, and along any horizontal parts using the one-for-one ratio. At the corners, pick up one extra stitch to prevent the corner from pulling.

Fixing mistakes and uneven stitches

If you discover you have picked up too many or too few stitches before you have knitted more than a row or two, the easiest fix is to drop all your stitches and start over. It takes less time than trying to add or remove stitches mid-row. If you have already knitted several rows, you can use a crochet hook to add or remove individual stitches, but this is fiddly and visible if not done carefully.

Uneven stitches along the picked-up edge usually mean your tension was inconsistent or you skipped a row by accident. If the unevenness is minor, it will even out as you knit the new section and the fabric relaxes. If it is severe, you may need to pick up again. To prevent this, count out loud as you go and check your count every 10 stitches.

If your picked-up edge looks loose or creates a line of holes, your needle was too large or you went too deep into the fabric. On your next project, use a smaller needle and stay closer to the very edge of the piece.

Working the first row after picking up

Once you have all your stitches on the needle, knit the first row as you normally would — no special technique needed. Some knitters purl the first row to create a neat ridge, which can look intentional and polished. Others knit it. Either works; it is a matter of preference and what the pattern specifies.

On the first row, you may notice that some of your picked-up stitches look loose or uneven. This is normal and will tighten up as you work. Do not try to fix individual stitches on the first row — just keep your tension consistent and move forward. By the third or fourth row, the edge will look much neater.

Frequently Asked Questions

What is the difference between picking up stitches and casting on?

Casting on creates new stitches from scratch at the beginning of a project. Picking up stitches anchors new stitches into existing fabric. Picking up is used when you already have a finished edge and need to add fabric to it; casting on is used when you are starting a new section from nothing.

Can I pick up stitches with a crochet hook instead of a knitting needle?

Yes. A crochet hook can be faster for picking up many stitches because you can work with a longer hook and move more quickly. Once you have all your stitches picked up on the crochet hook, transfer them to a knitting needle and knit as normal. This method is especially useful for large necklines or borders.

What if my picked-up edge looks wavy or puckered?

Waviness usually means you picked up too many stitches for the edge length. Puckering usually means your tension was too tight or you used a needle that was too large. On your next project, use a smaller needle, keep your tension even, and recount your ratio — you may need to skip more rows than you thought.

Do I have to pick up stitches right after finishing the main piece?

No. You can pick up stitches days or weeks later. The edge will still be clear and straightforward to work with. Some knitters prefer to let the piece sit for a while so they can see how it looks before committing to the next section.

How do I pick up stitches in the round?

Pick up your stitches the same way you would for a flat piece, but use a circular needle instead of straight needles. Once all stitches are on the needle, join them into a round by knitting the first stitch with the working yarn, being careful not to twist the stitches. Then knit in the round as normal.