Russia did not in 2020 have an economy the size of Italys. It had an economy almost the size of Germanys or about 3.900.000.000.000 US dollars in purchasing power parity, compared to Germany’s about 4.250.000.000.000 US dollars in purchasing power parity. But Russia’s GDP per capita was roughly half that of Germanys.
Italy’s GDP was about 2.350.000.000.000 US dollars in purchasing power parity but Italy had a significantly higher GDP per capita than Russia. Source; The CIA WORLD FACTBOOK