Texas Hold 'em 12345 or 23456, who is bigger?

Texas Hold 'em 12345 is bigger than 23456. In Texas Hold 'em, the size of the card face is judged according to the type of card. For the two straights you provided, 12345 and 23456, they are all five cards. When comparing the sizes of two straights, we need to compare their biggest cards. In this example, the largest hand is 6, so 23456 (from 2 to 6) is greater than 12345 (from 1 to 5).