HEAVYWEIGHTS (265-pound limit)
LIGHT HEAVYWEIGHTS (205-pound limit)
MIDDLEWEIGHTS (185-pound limit)
WELTERWEIGHTS (170-pound limit)
LIGHTWEIGHTS (155-pound limit)
FEATHERWEIGHTS (145-pound limit)
BANTAMWEIGHTS (135-pound limit)
WOMEN’S POUND-FOR-POUND (no limit)
(MMAWeekly.com World MMA Rankings last updated on February 1, 2012)