Units are a form of measurement that indicate the size of your bet on a game. These are personal measurements and every player will have a different idea of what a unit is to them. The most common scale goes between 1 and 5 with 5 being a bet of great value. This is a way to keep your accounts in check and help you decide the amount you put on a bet. It’s largely dictated by the amount of money you have in your account. Ideally, you should never bet more than 5% of your account on a single game. In this case, if you have $100 in your account, and you decide 1 unit is 1%, then the maximum you can bet on one game is $1.