The former Soviet Union (GDP):

Russia 🇷🇺 - $2.08 trillion 
Kazakhstan 🇰🇿 - $300 billion
Ukraine 🇺🇦 - $205 billion
Uzbekistan 🇺🇿 - $132 billion
Lithuania 🇱🇹 - $89 billion 
Turkmenistan 🇹🇲 - $89 billion
Azerbaijan 🇦🇿 - $79 billion
Belarus 🇧🇾 - $71 billion
Latvia 🇱🇻 - $45 billion
Estonia 🇪🇪 - $45 billion
Georgia 🇬🇪 - $35 billion
Armenia 🇦🇲 - $26 billion
Kyrgyzstan 🇰🇬 - $19 billion
Moldova 🇲🇩 - $19 billion
Tajikistan 🇹🇯 - $15 billion