Expansion velocities of the new and old holes plotted against their kinetic age. The size of any symbol is proportional to the diameter of the H I hole it represents. Even if their sizes are bigger, the relatively higher expansion velocities of the K93 sample holes push them to lie within a younger age area of the plot. The slower expansion velocities, close to the local H I velocity dispersion (∼10 km s⁻¹), render the kinetic age of the new sample very similar to that of the old.