Character and class type can be distinguished in several ways. It seems like most of the classes are party style classes. What is the maximum limit of characters in a party?
The last time we introduced the classes, we mentioned 3 class types. Damage dealers, provoker classes (tanks), and support. But the role of the provoker can be interchanged within the group. We have not yet determined the maximum limit of members in a party. We are still trying to finish tweaking things, but by the looks of it 4 to 5 members seems to be the likely format which works well. Tera is a game that you watch and play within the whole Tera world, not just an interface. If there are too many people in the party, it will affect the game play and performance. So we are still working on the balance by mixing and matching different ways.
Six different races, eight different classes. Will there be distinguishing physical differences between the male and female (like size). If so, Will this affect the balance between male and female characters?
Each race will have a difference between male and female. Of course different races and classes will have different sizes, but the effectiveness and range of the attacks will be the same. So each character's animations will be very similar. For example, a larger character may require a slight step backwards to attack and a smaller character may require a lunge forward to attack, but the effectiveness and range of attack is the same. it's hard to tweak balance in a game but we are trying to minimize that problem at the launch. So regardless of male or female toons, the balance will prevent any possible handicaps.
Source MMO Riot