The following lists the possible Poker hands in order of highest to lowest:

Royal Flush (beats a Straight Flush)
A, K, Q, J, 10 of the same suit.

Straight Flush (beats Four of a Kind)
Five consecutive cards of the same suit.

Four of a Kind (beats Full House)
Four cards of the same value.

Full House (beats a Flush)
Three of a Kind plus Two of a Kind.

Flush (beats a Straight)
Five cards of the same suit.

Straight (beats Three of a Kind)
Five consecutive cards not of the same suit.

Three of a Kind (beats Two Pairs)
Three cards of the same value.

Two Pairs (beats One Pair)
Two cards of the same value plus a different set of two cards of the same value.

One Pair
Two cards of the same value.