Differential number counts at 250, 350, and 500 μm. Our number counts derived from the SED prior-enhanced XID+ de-blended catalogue in COSMOS are shown as red stars (filled red stars: our number counts above the flux cut; empty red stars: our number counts below the flux cut). Error bars on the red stars only represent Poisson errors. The lines show the predicted number counts from various models and simulations (including SIDES, EGG, GALFORM, and the EAGLE hydrodynamic simulation). The empty diamonds are previous measurements based on Herschel observations.