There are essentially two different types of banking ETFs:
First, there are ETFs that focus on larger banks. These ETFs may contain mid and small-cap banks but the majority of the weight is allocated towards larger banks which include banks such as
The other category of banking ETFs deal with regional and smaller-sized banks. These ETFs are primarily comprised of small and mid-cap companies and most of the ETFs contain between 50 and 100 companies. There is also a leveraged and short ETF that focuses on this category.