The w3-padding-jumbo class adds 32px top and bottom and 64px left and right.
The w3-padding-xxlarge class adds 24px top and bottom and 48px left and right.
The w3-padding-xlarge class adds 16px top and bottom and 32px left and right.
The w3-padding-large class adds 12px top and bottom and 24px left and right.
The w3-padding-medium class adds 8px top and bottom and 16px left and right.
The w3-padding-small class adds 4px top and bottom and 8px left and right.
The w3-padding-tiny class adds 2px top and bottom and 4px left and right.