How to Sew Amigurumi Parts: Flat Bases and Open Rims
By The Slow Stitch · Terminology: US Crochet Terms · Reading time: 10 min read · theslowstitch.com
A flat tab and an open tube do not have the same attachment edge. The tab needs a line of stitches across its base. The tube needs a seam around its opening. Before threading the needle, decide which of those shapes you are joining and where its edge should sit.
The two exercises here use plain practice pieces without faces or accessories: a four-stitch-wide tab and a small cup with eight stitches around its rim. You will attach them to an amigurumi practice body, checking alignment before committing to the seam. They teach placement and sewing, not a complete toy design or a strength certification.
All crochet stitch names are in US terminology. The sewing stitches do not add crochet rounds to either piece.
What You'll Learn
By the end of this tutorial you will be able to:
- Prepare a flat tab and an open-rim practice piece
- Mark the attachment before sewing
- Join a flat edge without pulling the body out of shape
- Sew around an open rim and inspect the finish
- Inspect the seam and secure the sewing tail
What You Need
Smooth yarn that makes individual stitch tops easy to see
A hook suited to the yarn and the amigurumi practice body
Blunt yarn needle, Removable stitch markers or yarn scraps, Scissors, Optional toy filling for the practice body
Use the materials above for practice, adjusting the hook if needed for comfortable stitches. For a finished project, follow its pattern’s yarn, gauge and care requirements.
Abbreviations
| Abbr | Full Term |
|---|---|
| sc | single crochet (US; UK double crochet) |
| ch | chain |
| st | stitch |
Prepare the body and two different attachment edges
Use smooth yarn, a hook suited to it, a blunt yarn needle that passes through the fabric without forcing, scissors and removable markers or contrasting yarn scraps. Matching sewing yarn makes the seam less conspicuous; contrast sewing yarn makes its route easier to inspect. Neither choice changes the positions being joined.
For the body, follow the amigurumi basics lesson. Its practice piece has twenty-four stitches in each of rounds five, six and seven. Stop after round seven for now, before the decreases. Keep the working loop secured so it cannot unravel. The open body lets you examine the inside while attaching the flat tab.
Make the tab separately. Chain five, then single crochet into the second chain from the hook and each remaining chain: four stitches. Chain one and turn, then make four single crochets. Repeat once more for three rows altogether. Fasten off with about forty centimetres of yarn available for this short practice seam. The two turning chains are uncounted. The tab contains twelve single crochets; only its four final-row tops form the attachment base.
For the second exercise, make a small open cup. Work four single crochets in a magic ring. Work two single crochets in each stitch for the next round, giving eight. Continue in a spiral for two more rounds of eight, moving a first-stitch marker each round. Stop and fasten off with a sewing tail. Its final eight top Vs form the open rim; keep each one available for sewing. Secure the starting ring tail without drawing the rim closed.
These pieces are deliberately simple seam samples. They are not a leg, ear or muzzle pattern, and their sizes depend on your actual yarn and tension.
Mark the flat tab's four target positions
Keep the body's round marker visible. Locate round six and count actual stitch tops from its marked first stitch. Identify positions eight, nine, ten and eleven. Use temporary markers to outline that four-position segment without pulling the stitches out of shape.
Lay the tab against the body with its last-row edge following that segment. Spread its four top Vs so each sits near one of the four target tops. The rest of the tab should extend away from the seam in the direction you want it to lie. Turn the body to inspect the placement from the front and both sides.
The line belongs to one particular round, not to a diagonal made by whichever openings are easiest to reach. Spiral rounds can rise slightly along their course. Use the marked actual stitches to keep the chosen line consistent instead of trying to force a perfectly horizontal seam across unrelated rounds.
If you were adding a matching second tab on the opposite side, positions twenty to twenty-three have centres twelve stitch steps away from the first segment's centre. That is a counting reference on this twenty-four-stitch round, not a guarantee of a particular visual pose on a stuffed shape. Position both parts together and inspect them before sewing either permanently.
Remove or move any temporary marker only when you have identified the stitch it was marking. A marker is not a sewing base itself.
Sew one controlled line across the tab
Thread the tab's tail onto the blunt needle. Locate the first tab top beside the point where the tail emerges. If your tail is at the opposite end from the target order you planned, work the four pairs in reverse order rather than dragging a long visible thread across the tab.
For each pair, take a small sewing bite beneath the two top strands of the chosen body stitch, keeping the needle clear of loose filling. Then pass beneath both top strands of the corresponding tab stitch. Draw the sewing yarn through until the edges meet comfortably. This makes a simple overcasting stitch between two identified points.
Continue to the next pair. Keep the same relationship between needle entry, body top and tab top, so the sewing yarn travels around the meeting edges rather than wandering across the tab's face. Each of the four tab tops is matched once with its planned body top for this first pass.
Do not pull the body stitch into a long loop to make it reach the tab. The two fabrics should sit together before the sewing yarn is tightened. If the tab buckles or the body develops a deep dimple, ease the last stitch and check the placement.
After four pairs, pause. Look inside the still-open body for a loose thread span or a missed target. Check that the tab is attached across its base rather than accidentally along its side. This short line demonstrates a seam route; four sewing stitches alone are not a universal attachment specification for a finished item.
Finish the flat seam without hiding a mistake
Ease each sewing stitch individually until there is no loose gap, while leaving the underlying crochet its shape. A sharp pull on the final tail cannot reliably correct several uneven stitches farther back along the line.
If you need to change the tab's angle, undo the relevant sewing stitches before securing the tail. Cutting into the seam can also cut the crochet, so keep the needle route and the fabric strands identifiable. Remove all placement markers once the position is settled.
Secure the tail through neighbouring fabric using a route appropriate to the yarn and intended use. Keep it long enough to change direction and inspect the finish. The weaving-ends guide explains why a buried straight tail and a secure woven finish are different things. Trim only after the seam and tail route have been checked.
Now finish the body using the decreases and closure in the amigurumi basics lesson. Add filling gradually if you want a filled practice shape, keeping it out of the seam and avoiding strain on the crochet. The filling guide helps distinguish overfilling from fabric that is already too open.
Position the eight-stitch open rim
Place the small cup against a clear area of the finished body. Its opening should meet the body surface all the way around; its closed end points away from the body. Do not flatten the rim shut unless the pattern you are following actually calls for a flattened attachment.
Count and mark rim stitches one, three, five and seven. These divide the eight-stitch rim into four two-stitch sections. Arrange those four marked points around the intended footprint on the body, then check the unmarked stitch between each pair.
There is no automatic one-to-one match between the cup's eight rim stitches and eight consecutive stitches along one body round. The footprint travels around an area on a curved surface. Choose small, nearby fabric bites around that outline rather than forcing the whole rim onto a straight row.
Inspect the position from several sides. If the cup only touches at two opposite points, or has to be pulled flat to reach the body, reconsider the location and angle before sewing. Temporary placement holds the chosen position; it should not stretch the pieces into a different shape.
Sew around the opening in short sections
Thread the cup's sewing tail. Begin near the point where that tail leaves the rim. Take a small bite through sound body fabric just beside the rim, then pass under both top strands of the corresponding rim stitch. Draw the yarn through gently until that part of the edge meets the body.
Continue around the outline, moving from one rim stitch to the next and selecting the next body bite immediately beside the meeting edge. Keep every bite close enough to the rim that the thread does not span a broad visible section of the body. Do not reuse a distant convenient gap simply because it is easier to see.
Pause after each two-stitch rim section. Remove its temporary marker when you can identify the finished section. Check that the cup has not rotated and that no long loose thread lies between the surfaces. There are eight rim tops to account for in a complete first circuit, not sixteen because each top V has two strands.
Before sewing the final section, inspect the opening and any filling you chose to use. Complete the remaining attachment, then examine the whole join for a missed rim top, a gap or a pulled body stitch. A neat appearance does not prove a seam will withstand a finished object's use; the complete pattern must supply a suitable construction and finish.
Secure the sewing tail through the fabric and inspect it before trimming. Remove every remaining marker. Keep this piece as a reference for how a rim seam differs from the tab's straight attachment line.
Keep placement, seam route and finished use separate
If a part sits at the wrong angle, tightening the seam harder usually makes a deeper dent rather than a better position. If a gap remains, look for an omitted edge top or widely spaced body bites before adding a random stitch through the middle of the part.
A finished pattern may specify a different sewing route, one edge strand instead of both, a closed or flattened base, or attachment during crocheting. Those are construction choices, not interchangeable labels. Read the attachment instruction together with the final round of the part.
Use the assembly planning guide when deciding the order of several attachments. This lesson supplies two practice routes and their counts; that guide helps you plan access, symmetry and finishing before a more involved assembly.
Record which edge was sewn, which face was visible and how you secured the tail. Keep those notes with the actual pattern so the next matching part is attached for the same reason and in the same way.
Ready for your next little make?
Keep learning with this free lesson, or explore complete crochet project PDFs in the shop, with materials, measurements, construction photos and finishing guidance.
What to Make Next
Three logical next steps to continue practicing:
Amigurumi Basics: Spirals, Shaping and a Practice Piece
Make the twenty-four-stitch body used here.
How to Crochet a Magic Ring: A Beginner’s Guide
Review the starting ring for the small cup.
How to Weave in Ends on Single Crochet
Review securing tails after inspecting the seam.


