In Limit
The small blind will be $1 and the big blind $2.
On the flop, the initial bet allowed will again have to be $2 with possible raises of $2 at a time for a maximum of 3 raises/reraises.
On the turn and river, the initial bet allowed will now have to be $4 with possible raises of $4 at a time with a cap once again.
In Pot Limit
Finally, in No Limit