Russia indeed has a small economy if converted into dollars, but not if the intermal price of goods and services is considered. This is because the conversion only works for economies that are well connected and comparable.

This is doubly true for military matters which are very illiquid, and even more so given the sanctions Russia is facing. The measure you are looking for is called purchasing power parity adjustment, or “GDP (PPP)” for short. It is hard to compile though.

No need for “hmm”, just readily available knowledge in economics.