Scatter density maps showing the relationship between the lifetimes and surface areas of QS EUV brightenings detected in this study, combined with the events reported in Narang et al. (2025). The colour scale indicates the number density of events per pixel in logarithmic normalisation. Black points correspond to the mean surface area within each of 20 equally spaced bins in the lifetime. The blue dashed line indicates a linear fit to the binned (black) data. The correlation coefficient for the full dataset is 0.31. The correlation coefficient and slope of the linear fit to the binned data are shown in the legend.