Seven-card stud is most often played as a limit game. Sticking with the same example of our $10/$20 seven-card stud game, the limits of betting on third and fourth street would be the smaller limit, or $10 in this case. On fifth, sixth and seventh street, the limits increase to $20.
In the case that a player pairs his door card on fourth street, the opening player now has the option to bet double the small limit, or the larger limit. For example, if a player begins with an ace and picks up another ace on fourth street, that player may open with a bet of $20 instead of $10. This unique betting rule only takes place in the high version of seven-card stud, and not the split-pot version.