In Australia you can choose a PIN up to 6 digits, though the banks may warn you that a >4 digit PIN can be problematic in countries like, well, the UK I suppose

In Australia you can choose a PIN up to 6 digits, though the banks may warn you that a >4 digit PIN can be problematic in countries like, well, the UK I suppose. edit: huh, it's actually more than 6. According to Commonwealth Bank, it can be up to 12.