Made and counted by Wren —

Moon and Saturn amigurumi keychain crochet pattern

3 mm hook, 4-ply yarn: makes a purple Moon and Saturn amigurumi with a light blue Ring of Saturn, for keychains or bag charms.

BeginnerLevel

1-2 hoursTime

3 mmHook

Fingering (4-Ply)Yarn

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About this pattern

This pattern makes a small purple amigurumi shaped like a moon or Saturn, worked in continuous single crochet rounds on a 3 mm hook. Round 1 starts with 6 single crochets into a magic circle; Round 2 increases to 12, Round 3 alternates to 18, Rounds 4-7 work even, and Rounds 8-9 decrease the piece before stuffing and closing it off. A light blue Ring of Saturn is added by single crocheting into the front loops of a previous round, and the yarn tail attaches the keychain. The finished piece is sized for a keychain or bag charm, using four-ply yarn, a stitch marker, and a yarn needle for closing seams.

This amigurumi charm works up from a magic circle in single crochet rounds, shaping the moon or Saturn ring in continuous spirals rather than joined rounds. Round 1 sets 6 single crochets into the circle; Round 2 doubles that to 12 single crochets, the increase that establishes the curve of the whole piece. Round 3 alternates plain and increase stitches to reach 18 single crochets, then Rounds 4-7 work even before Rounds 8-9 decrease the piece back down and close it off with stuffing. A light blue Ring of Saturn is then added by working single crochets into the front loops left from a previous round, and the yarn tail is used to attach the keychain. Purple yarn on a 3 mm hook keeps the fabric dense enough to hold stuffing without gaps at the stitch marker. The finished piece is small enough for a keychain or bag charm, and every later round's count builds directly off that first Round 2 total of 12.

The pattern

Written out round by round

Materials

Purple yarn (four ply recommended)
3 mm crochet hook
Stitch marker
Stuffing material
Yarn needle
Light blue yarn (for the Ring of Saturn)

Abbreviations

ch = chain
st = stitch
sl st = slip stitch
sc = single crochet
hdc = half double crochet
dc = double crochet
inc = increase
dec = decrease
mr = magic ring
fo = finish off

Main Pattern

Round 1Create a magic circle. Chain 1 (this does not count as a stitch). Make 6 single crochets into the magic circle.Pull on the tail to close the magic circle.Place a stitch marker at the last stitch.

Round 2Increase Round Increase in each stitch around (2 single crochets in every stitch).

You will have 12 single crochets.

Round 3Alternating Increase Single crochet in one stitch, increase in the next. Repeat from to around.End with 18 single crochets.

Rounds 4–7Single crochet in each stitch around (18 single crochets each round).

Round 8Decrease Round Single crochet, then invisible decrease. Repeat this sequence around the ring.End with 12 single crochets.

Round 9Decrease All Around Decrease in each stitch around.Close off the amigurumi, stuff it, and weave the tail through to close it up.

Ring of SaturnUsing light blue yarn, work single crochets around into every front loop left from a previous round.Attach the keychain with the yarn tail, securing all ends inside the amigurumi.

Tester's notes

3 mm hook paired with four-ply yarn produces a firm, gap-free fabric that holds stuffing — sizing down the hook tightens stitches further if the fabric feels loose.

Round 1's 6 single crochets set the base count for every increase round that follows; miscounting here throws off Round 2's total of 12.

Move the stitch marker to the last stitch of each round, not the first, since Round 1 places it at the last stitch worked before Round 2 begins.

Stuff in small amounts as rounds progress rather than all at once at the end; dense stuffing early keeps the shape round instead of lumpy at the closing rounds.

Work in progress

Moon and Saturn amigurumi keychain crochet pattern — photo 2

Moon and Saturn amigurumi keychain crochet pattern — photo 3

At a glance

Rounds	7
Level	Beginner
Time	1-2 hours
Hook	3 mm
Yarn	Fingering (4-Ply)

Gauge check

After Round 1, count 6 single crochets around the magic circle and pull the tail tight enough that no hole remains at the center.

After Round 2, count 12 single crochets; if the total is off, the stitch marker placement at the end of Round 1 is the easiest checkpoint to recount from before continuing.

If something looks wrong

The center of Round 1 still shows a: The magic circle wasn't cinched tight enough before Round 2 began; pull the starting tail firmly until all 6 single crochets sit snug, then weave it in so it can't loosen.
Round 2 comes out with more or fewer than 12 stitches.: One or more of the paired increases in Round 1's stitches was skipped or doubled; recount Round 1's 6 stitches first, then work exactly two single crochets in each before moving on.
The stitch marker keeps falling out or: The marker was placed in a stitch other than the last one worked; move it to the final stitch of the round every time, right before starting the next round.
The piece feels floppy or the stuffing shows through gaps.: The 3 mm hook is producing loose stitches for the yarn weight; drop to the next smaller hook size or tighten tension on each single crochet.

Yarn substitutions

Cotton, fingering weight	Matches the four-ply gauge closely, holds its shape well for stuffing, and keeps the 3 mm hook as written.
Wool-blend, sport weight	Drapes softer than four-ply cotton or acrylic, so pack stuffing a bit firmer to keep Round 2's 12-stitch increase from sagging.

Original pattern: https://crocheteverything.com/crochet-cute-moon-saturn-amigurumi-pattern-for-keychain-bag-charm/

FAQs

Questions

Can the piece be made without a stitch marker?

The marker tracks the last stitch of each round since rounds aren't joined with a slip stitch, so skipping it means recounting from Round 1's 6 stitches every time. It's a fast checkpoint, not a structural requirement, but it prevents drift in the increase counts.

Is four-ply yarn required, or will a thicker yarn work with the 3 mm hook?

Four-ply yarn is sized to the 3 mm hook for this pattern's stitch counts, producing dense fabric that holds stuffing at the small keychain or bag-charm scale. A thicker yarn on the same hook loosens the fabric and changes the finished size beyond the 6-then-12 stitch shaping the pattern is built on.