It's fairly easy to construct a "Koch-like curve" of any dimension $s$ in the open interval $1
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Note that $r$ is parameter satisfying $1/4
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Depending on your meaning of "Koch-like curve", you might say that we've already hit the values $1$ and $2$. There is also a notion of borderline fractal that might be more "Koch-like" but is not strictly self-similar. I might be able to elaborate on that, if there is interest.