The volume of a colloidal particle, $V_C$ as compared to the volume of a solute particle in a true solution $V_S$, could be:

Colloidal particles have diameters in the range of $1$ to $1000\text{nm}$, while solute particles in true solutions are less than $1\text{nm}$.Assuming spherical particles ($V\propto r^3$):If $r_{colloid}\approx 10\times r_{solution}$, then $V_C\approx 10^3\times V_S$.A common estimation for the ratio of volumes is between $10^3$ and $10^9$. Among the options, $10^3$ is the most appropriate magnitude.