Hello Hayley, dont be nervous its fine all they do is go through what look you would like to achieve, look at you and take measurments, go through if you can have them under or over the muscle and what sizes you can go to, i just showed my surgeon pics of the look i woud like to achieve and he basically left it up to me to decide if i wanted overs or unders, i ordered 2 sizes to choose from and my BA is this saturday, good luck hun dont be worried its fine xx