This study makes an upper shell with four growth rounds and a lower shell with three, each followed by three even rounds and reductions to a twelve-stitch rim. The upper copy contains 162 single-crochet outputs and the lower 102, giving 264 before assembly. Their widest counts differ, twenty-four and eighteen, while their attachment counts agree at twelve. That matched rim relationship is what makes the seam count explicit.
Keep both openings available for sewing
The upper sequence is six, twelve, eighteen, four consecutive rounds at twenty-four, eighteen and twelve. The lower sequence is six, twelve, four consecutive rounds at eighteen and twelve. Neither shell ends with a six-loop drawstring closure. Add filling while the openings remain accessible and preserve both final sets of twelve stitch tops. Closing one prematurely would replace the designed rim-to-rim join with an unspecified surface attachment.
Align quarter marks and reverse the pairing order
Bring the two open rims together with their right sides outward, pinning corresponding quarter points. The saved seam matches source rim positions one through twelve to receiving positions twelve down through one. This reverses the traversal around the facing openings while retaining twelve one-to-one pairs. Sew once around, then reinforce the same seam and hide the tail. Those twelve attachment pairs are sewing work, not a thirteenth crochet round or another twelve outputs.
FAQ and practical checks
Why do differently sized shells have the same neck?
Each has its own reduction stage ending at twelve. The maximum circumference does not determine the final rim count by itself.
Does the graph show exact stuffed proportions?
It shows which copies connect and where their counted rims belong. Measure actual finished proportions in a physical sample.
Can I swap upper and lower colors?
Save a revised palette and retain the same part roles and seam references. Color changes do not exchange the two different count sequences.
How do I repair a twisted join?
Unpick it, re-establish both start markers and quarter pins, then repeat the stated reverse-order pairing without skipping rim positions.
Exact setup, stitch key and complete sequence
Open the Amigurumi Shape Planner, choose two-part, set growth rounds to 4 and even rounds or shaft length to 3. Download the exact original project JSON before editing it. Use smooth compatible yarn, a hook giving firm fabric, removable markers, suitable filling and a tapestry needle. The swatches identify component yarn roles; they do not assign a different yarn to every round unless a row explicitly says so.
In US terms, sc means single crochet, an increase works two sc in one old base and sc2tog consumes two bases to make one stitch. In UK mode those become dc and dc2tog without changing source coordinates or counts. Mark the first stitch of each separate spiral and move the marker after every completed circuit; do not add joining slip stitches or turning chains. Follow each part's own start, final rim and closure. Make the stated number of copies, then execute any separate attachment rows. Read the amigurumi shaping guide and compare the actual fabric after filling. The diagram is a counted construction reference; physical size, bend angle and finished suitability need a real sample. Finish every tail securely before handling the completed form.
Every worked round and attachment step
Upper shell (make 1), round 1, base yarn #678591: Magic ring: ch 1 (not counted), 6 sc. Tighten ring and mark first stitch. Continue in a spiral without joining or turning. [6 outputs per copy]
Upper shell (make 1), round 2, base yarn #678591: Repeat [0 sc, 2 sc in next stitch] 6 times. Each increase makes two stitches in one old base. [12 outputs per copy]
Upper shell (make 1), round 3, base yarn #678591: Repeat [1 sc, 2 sc in next stitch] 6 times. Each increase makes two stitches in one old base. [18 outputs per copy]
Upper shell (make 1), round 4, base yarn #678591: Repeat [2 sc, 2 sc in next stitch] 6 times. Each increase makes two stitches in one old base. [24 outputs per copy]
Upper shell (make 1), round 5, base yarn #678591: Sc once in each old stitch; move the first-stitch marker. [24 outputs per copy]
Upper shell (make 1), round 6, base yarn #678591: Sc once in each old stitch; move the first-stitch marker. [24 outputs per copy]
Upper shell (make 1), round 7, base yarn #678591: Sc once in each old stitch; move the first-stitch marker. [24 outputs per copy]
Upper shell (make 1), round 8, base yarn #678591: Repeat [2 sc, sc2tog over next two stitches] 6 times. Each decrease consumes two old bases and makes one stitch. Add filling before the opening becomes too small. [18 outputs per copy]
Upper shell (make 1), round 9, base yarn #678591: Repeat [1 sc, sc2tog over next two stitches] 6 times. Each decrease consumes two old bases and makes one stitch. Add filling before the opening becomes too small. Fasten off with a long sewing tail. Keep the twelve-stitch rim open for the matching attachment; add filling before the seam closes. [12 outputs per copy]
Lower shell (make 1), round 1, base yarn #CE9D77: Magic ring: ch 1 (not counted), 6 sc. Tighten ring and mark first stitch. Continue in a spiral without joining or turning. [6 outputs per copy]
Lower shell (make 1), round 2, base yarn #CE9D77: Repeat [0 sc, 2 sc in next stitch] 6 times. Each increase makes two stitches in one old base. [12 outputs per copy]
Lower shell (make 1), round 3, base yarn #CE9D77: Repeat [1 sc, 2 sc in next stitch] 6 times. Each increase makes two stitches in one old base. [18 outputs per copy]
Lower shell (make 1), round 4, base yarn #CE9D77: Sc once in each old stitch; move the first-stitch marker. [18 outputs per copy]
Lower shell (make 1), round 5, base yarn #CE9D77: Sc once in each old stitch; move the first-stitch marker. [18 outputs per copy]
Lower shell (make 1), round 6, base yarn #CE9D77: Sc once in each old stitch; move the first-stitch marker. [18 outputs per copy]
Lower shell (make 1), round 7, base yarn #CE9D77: Repeat [1 sc, sc2tog over next two stitches] 6 times. Each decrease consumes two old bases and makes one stitch. Add filling before the opening becomes too small. Fasten off with a long sewing tail. Keep the twelve-stitch rim open for the matching attachment; add filling before the seam closes. [12 outputs per copy]
Pin Upper shell 1 to Lower shell 1; matching open rims. Use the source's final round 9. Align the two twelve-stitch openings with both right sides outward; pin four quarter points before sewing. Match source rim positions 1–12 in order to receiving round 7, stitches 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1. Sew 12 pairs once, then reinforce that same seam without adding crochet stitches. Add filling before the last gap closes and conceal the tail. Check orientation and actual fit before permanent attachment. [12 attachment pairs]
