To make everything bigger or smaller press the following key combinations:
Bigger - Ctrl+Shift and Plus +
Smaller - Ctrl+Shift and Minus -
Reset to default - Ctrl+Shift+0 (zero)
You can also make the cursor size larger by going to Chrome Settings, Under Advanced-> Accessibility->Manage accessibility features->Mouse and touchpad, click on Show large mouse cursor. This will give you a slider for adjusting the size.