Finishing is the part everyone rushes, and it is most of the difference between a project that looks handmade and one that looks homemade.

Three jobs: secure the ends, block the fabric if the fiber will respond to it, and join the pieces. None of them take long. All of them show.

Fastening off

When a piece is finished, cut the yarn leaving at least a six-inch tail — longer, eight to ten inches, if you will be seaming with it. Then yarn over, pull the cut end all the way through the last loop on your hook, and tug gently to snug it down.

That secures the stitch. It does not secure the tail, which is the next job.

Weaving in ends properly

A tail that is simply threaded straight through the fabric will work its way loose. Wear and washing both pull at it. The goal is friction and direction changes.

Thread the tail onto a blunt tapestry needle — blunt, so it slides between the plies instead of splitting them.

The method that holds:

Run the needle through the backs of four or five stitches on the wrong side, following the direction of the stitch bumps rather than cutting straight across.
Change direction. Turn and weave back through several more stitches, roughly at right angles or straight back the way you came but through a different path.
Optionally, split a ply once on the way back. This is what makes it genuinely permanent.
Trim close to the fabric, then stretch the piece gently in both directions so the cut end retracts inside.

The direction change in step 2 is the important part. A single straight pass has nothing stopping it sliding back out; a pass that reverses on itself cannot.

Match the tail to the stitches you weave it through. Run dark tails through dark areas and light tails through light. Weaving a navy end through a cream stripe will show a shadow through the fabric, and it gets worse after the first wash.

For amigurumi, weave the tail across the inside of the piece, catching stitches on the way, then bring the needle out and back in through the same spot before trimming. Toys get handled hard, and there is no wrong side you can inspect once it is stuffed and closed.

Weave in as you go. On a striped blanket with forty color changes, leaving all the ends for the end creates a finishing session nobody enjoys, and it is where projects die two rows from complete.

Blocking

Blocking means wetting or steaming a finished piece, shaping it to the measurements you want, and letting it dry that way. It relaxes the stitches, evens out tension irregularities, opens up lace, and makes edges lie flat instead of curling.

Whether it does anything at all depends entirely on the fiber.

Fiber	Does blocking help?	Method
Wool and wool blends	Dramatically	Wet block
Cotton and linen	Yes, noticeably	Wet block
Acrylic	Barely, unless steamed	Steam, with care
Superwash wool	Yes, but it can grow	Wet block, do not stretch far
Novelty and fuzzy yarns	No	Skip it

Wet blocking, for wool and cotton

Soak the piece in cool water with a little wool wash for fifteen to twenty minutes, until it is fully saturated.
Lift it out supporting the whole weight — never let a wet piece hang, it will stretch permanently.
Press the water out between towels. Do not wring or twist.
Lay it on a padded flat surface — a towel-covered bed, a blocking mat, a carpet — and pin it to the measurements you want with rustproof pins.
Let it dry completely before unpinning. This takes a day, sometimes two. Unpinning early undoes the work.

This is what turns a lumpy, curling granny square into a crisp flat one, and it is genuinely transformative on lace.

Steam blocking, for acrylic

Acrylic is a plastic and it does not respond to water. It does respond to heat — permanently, which is both the point and the danger.

Hold a steam iron above the piece and let the steam do the work. Do not let the iron touch the fabric. Acrylic will melt, flatten, and go shiny, and that damage cannot be reversed. This is often called “killing” acrylic, and while some people do it deliberately for drape, it is not something you can undo if you change your mind.

Work in short bursts, check as you go, and keep the iron moving.

Textured stitches need extra care. Bobbles, popcorns, and puffs lose their dimension if pressed. Steam them lightly from further away, or skip blocking them altogether.

When to skip blocking

Acrylic blankets, dishcloths, amigurumi, bags, and anything that gets thrown in the washing machine regularly. There is no benefit, and for amigurumi you actively want the fabric firm.

Joining pieces

Two approaches, and the choice is about how visible you want the seam.

Whipstitch, sewn with a needle. Line the pieces up edge to edge with the wrong sides facing you, and sew through the matching stitches on each side. Nearly invisible from the front, and it lies flat. This is the right choice for garment shoulders and anywhere the seam should disappear.

Slip stitch join, with a hook. Hold the pieces with right sides together, then slip stitch through one loop of each piece along the edge. Faster than sewing, and it creates a small firm ridge. Good for blankets made of squares, bags, and anywhere a bit of structure at the seam is welcome.

A third option worth knowing: single crochet the pieces together for a deliberately visible raised seam, used decoratively on granny square blankets.

Block before seaming, not after. Flat, correctly sized pieces line up. Curling ones do not, and you will fight them the whole way.

The order to do all this in

Weave in the ends on each piece as you finish it.
Block the pieces.
Seam them together.
Add the border or edging.
Weave in the last few ends.

Blocking after seaming works, but blocking flat pieces is much easier than wrestling an assembled garment onto a mat.

Frequently asked

How long do woven ends need to be? Six inches minimum. Anything shorter cannot make the direction change that keeps it in place.

Can I use a knot instead? You can, and it will hold, but it will also migrate to the surface over time and show as a hard bump. Woven ends are barely slower and look far better.

Do I have to block? No. For acrylic blankets and toys, skip it entirely. For wool garments, lace, and granny squares, it is the single biggest improvement available for twenty minutes of work.

My granny squares curl at the corners. Blocking fixes this on wool and cotton. On acrylic, light steam will help. Persistent curling can also mean the corner stitch count is slightly tight.

Can I block something twice? Wool and cotton, yes, as often as you like — every wash is effectively a re-block. Steamed acrylic, no; the change is permanent.