Crochet Journal
When to Go Up or Down a Crochet Hook Size
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Moving one hook size can change both the measurement and the feel of crochet fabric. The reason for changing matters.
Go down when the swatch is too large
If the pattern expects more stitches within the measurement area than your swatch contains, your stitches are too large. A smaller hook is the usual next test.
Go up when the swatch is too small
If your swatch contains more stitches than the pattern within the same distance, your stitches are too small. Try a larger hook and measure a new sample.
Adjusting fabric without a fixed gauge
A smaller hook usually creates a firmer, denser fabric; a larger hook usually creates a looser fabric with more drape. That can be useful for original projects, but large changes may expose stuffing, weaken structure or alter yarn requirements.
Do not correct everything with grip pressure
Trying to crochet unnaturally tight or loose is difficult to maintain across a project. Use a hook that allows a comfortable, repeatable motion, then confirm the result after the swatch is washed or blocked as directed.
Keep this in mind
Use a smaller hook for an oversized swatch and a larger hook for an undersized one, then measure again.
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