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From the unified rules:

Specifications for bandages on hands for mixed martial art contestants.
(A) In all weight classes, the bandages on each contestant’s hands shall be restricted to soft gauze type cloth not more than thirteen yards in length and two inches in width, held in place by not more than ten feet of surgeon’s tape, one inch in width for each hand.
(B) Surgeon's adhesive tape shall be placed directly on each hand for protection near the wrist. The tape may cross the back of the hand twice and extend to cover and protect the knuckles when the hand is clenched to make a fist.
(C) The bandages shall be evenly distributed across the hand.
(D) Bandages and tapes shall be placed on contestant's hands in the dressing room and must be inspected by the inspector or commission representative.
(E) The manager or chief second of the opponent may elect to be present when hands are being wrapped.
(F) Under no circumstances are gloves to be placed on the hands of a contestant until checked by the inspector or commission representative.