Nuclear continuum SED from centimeter wavelengths to the infrared of NGC 3227. The small-aperture (∼0.1 − 0.2″) MERLIN data points are for the southern source of Mundell et al. (1995b). The large-aperture (> 0.2″ to ≤1″) VLA and PdBI data points are from Nagar et al. (2005) and Sani et al. (2012), respectively. All the ALMA continuum data points are from this work. The very small aperture (a few milli-arcseconds) points are the EVN radio fluxes from Bontempi et al. (2012). The fit (black dashed line, with the ±1σ uncertainty plotted with the shaded gray region) is made to the near- and mid-infrared emission using the Nenkova et al. (2008a,b) clumpy torus models (see García-Bernete et al. 2019, for more details). We also plot the observed mid-infrared data point for reference although the fitted data also included near-infrared photometry and mid-infrared spectroscopy. The magenta dashed line is the fit to the MERLIN radio points extrapolated to the ALMA wavelengths.