What Hook Size for Amigurumi?

Smaller than the yarn's label suggests — amigurumi deliberately undersizes the hook relative to normal recommendations, closing the fabric up tight enough that stuffing has nowhere to peek through, rather than following a standard weight-to-hook chart at all.

Roughly what this looks like in practice

Take a typical worsted-weight yarn's own recommended range and drop two or three full sizes below it — that's roughly where amigurumi actually lands in practice. The exact right size still depends on your own tension and the specific yarn's thickness, so treat this as a starting range to swatch from, not a fixed rule.

Judge it by density, not by a number

The actual target isn't a specific hook size at all — it's fabric with no visible gaps once stuffed and under tension. Work a small swatch, stuff a scrap behind it, and check whether the fill shows through; if it does, size down further regardless of what number you're currently on.

Why this matters more than almost any other gauge decision on this site

Unlike garment gauge, where being slightly off changes fit, amigurumi gauge that's too loose changes whether the piece looks finished at all — visible stuffing reads as an obvious construction flaw rather than a minor size discrepancy, which is exactly why amigurumi patterns are unusually specific about hook size relative to yarn weight compared to most other crochet patterns.

Consistency across a multi-piece toy matters as much as the size itself

Whatever specific hook size you land on, use the identical size and tension across every piece of the same toy — a head worked at a different density than the body it attaches to throws off the whole toy's proportions, even if neither piece individually looks wrong in isolation.

FAQ

Does a smaller hook mean amigurumi uses less yarn than a normal-gauge project of the same size? No — a tighter gauge means more stitches packed into the same physical area, which generally uses more yarn per square inch, not less, despite the smaller hook.

Should I follow a specific amigurumi pattern's stated hook size exactly, or adjust based on my own tension? Start with the pattern's stated size, swatch, and check for stuffing show-through — adjust down further if needed, since individual tension varies enough that even a pattern's tested size doesn't guarantee an identical result in every crocheter's hands.

Is there a single hook size considered universal for amigurumi regardless of yarn weight? No — the right size scales with yarn weight the same way any hook-to-yarn relationship does; a bulkier yarn's amigurumi hook is still smaller than that yarn's normal recommendation, just not the identical number as a worsted-weight amigurumi project would use.