To bring you up to date on tourist visas, the Mexican immigration
service advises about minor changes in their issuing for the purpose of
entering Mexico.
Tourist visas cost US$17 or the peso equivalent. For those entering
Mexico by plane, the cost of the tourist visa is charged to the plane
ticket. The maximum time for a tourist to remain in Mexico is 180
days and this visa cannot be extended beyond that time.
Often, when entering the country at the northern or southern borders,
immigration officials may state the visa is good only for a shorter period
of time. If the visitor wishes to remain longer than the changed
visa allows, it can be extended up to and including 180 days at the
nearest state immigration office.