The first two columns (panels (a)–(d)) represent four clouds of varying initial size ℓ_T, ∥0(k₀λ_F) after saturation in the simulations with anomalous conductivity, radiative cooling, and maintained net thermal balance. The x-axis and y-axis are in code units (3.086 × 10²¹ cm and 1.672 × 10⁻²⁴ g cm⁻³, respectively). The second column (panels (b) and (d)) further demonstrates convergence of the cloud sizes. The upper panel in the third column (e) shows the final size (kpc) of the clouds as a function of initial ﹩{{ \mathcal P }{\mathbb{a}}}_{{\rm{c}}}={\lambda }_{{\rm{s}}}\ell /{\lambda }_{{\rm{F}}}^{2}﹩, and λ_F6 is the predicted Field length at low-temperature stable phase (2 × 10⁶ K) in our simulations. The lower panel (f) in the third column shows rms density fluctuations with time (normalized to mean τ_cool). In order to understand the decay of the classical large-scale cloud (light red), we further show the predicted classical decay timescale (τ_c6, orange), isobaric TI timescale (τ_ib6, dark purple dashed), and isochoric TI timescale (τ_ic6, light purple dashed) at 2 × 10⁶ K across all mean densities (at each time) in the inset. The orange line essentially tracks the decrease in the characteristic cloud size in the box.