This is 300px by 300px.
This is 150px by 150px.
This is 75px by 75px. This is about the size the logo is going to be in the header, next to the menu.
This is 300px by 300px.
This is 150px by 150px.
This is 75px by 75px. This is about the size the logo is going to be in the header, next to the menu.