It seems what an ETF provider think of as world seem to differ vastly. Below is just few that I looked at which says “world” or “global”.
ETF Ticker Stocks VWRL 3781 V3AM 5879 IWDG 1519 EGMW 1375 UC44 384
Beside the fund size, is the number of stocks within the ETF a huge deciding factor? Or is it a case of quality vs quantity?
They follow indices which are published by FTSE and MSCI. The index providers publish different indices, such as All-World, World ESG, etc. where the stocks listed in the index are defined by a set of criteria. With “Full replication” ETFs, the number of stocks is usually defined by replicating the index they follow. VWRL is an example of a fully replicating ETF.