The following is a listing of poker hand rankings, listed from highest to lowest:

Royal Flush
The five highest cards, 10 through the Ace, all five of the same suit. A royal flush is actually an ace-high straight flush. Which suit it is doesn't matter in poker. Two people with royal flushes is considered a tie.

Straight Flush
Any five cards of the same suit in consecutive numerical order.

Four of a Kind
Four cards of the same denomination.

Full House
Any three cards of the same denomination, plus any pair of a different denomination. Ties are broken first by the three of a kind, then the pair.

Flush
Any five non-consecutive cards of the same suit.

Straight
Any five consecutive cards of mixed suits. Ace can be high or low.

Three of a Kind
Three cards of the same denomination.

Two Pair
Any two cards of the same denomination, plus any other two cards of the same denomination. If both hands have the same high pair, the second pair wins. If both pairs tie, the high card wins.

Pair
Any two cards of the same denomination. In a tie, the high card wins.

High Card
If no other hand is achieved, the highest card held wins.