Properties of the PAH clouds vs R_gal for all the clouds in the 66 galaxies: Σ_mol of the cloud (left), R_eq (middle), and the total number of galaxies contributing to a specific bin (right). The running galaxy median (filled black circles) is plotted for a bin width of 0.2 R_e. The gray-shaded region represents the interquartile range of the medians per galaxy. The error bars on the median are the standard errors (1.253σ/$\sqrt{N}$), where N is the number of galaxies contributing to a specific bin. The background data points represent a scatterplot of the full sample of GMCs colored by the normalized density of clouds. The red-shaded region depicts the maximum extent of the central clouds. The horizontal dashed black line in each plot corresponds to the median of the plotted property.