Left: CLEAN image of SS 433 observed with VLBA + VLA at 1.4 GHz. The image was restored using an elliptical Gaussian beam of 26.0 × 15.2 mas, oriented at a position angle of −12°. Contours start at 1.5 mJy beam⁻¹ and increase by factors of ﹩\sqrt{2}﹩. The jet viewing angle at this epoch is ∼97^∘. Right: deconvolved jet width of the eastern jet as a function of deprojected distance from the core, derived from the image on the left. The red solid line shows the power-law fit, with the shaded region indicating the 3σ confidence interval. This fit suggests a cylindrical profile.