The formula for resistivity is:

$\rho =\frac{RA}{L}$

where $\rho $ is resistivity, $R$ is resistance, $A$ is cross-sectional area, and $L$ is the length of the conductor.

We can see from the formula that $A$ and $L$ are involved, why then does resistivity not depend on dimensions?

$\rho =\frac{RA}{L}$

where $\rho $ is resistivity, $R$ is resistance, $A$ is cross-sectional area, and $L$ is the length of the conductor.

We can see from the formula that $A$ and $L$ are involved, why then does resistivity not depend on dimensions?