I'm going to be doing a baby shower cake. A sheet cake with three blocks on top with the baby's initials on each block. The last baby shower cake I did was for about 45 people and I made a 11 x 15 sheet cake. There was plenty to go around and a little extra left over. This shower will be the same at about 45 people. My dilemma is trying to determine how big to make the cake and then how big to make the blocks so they don't look out of proportion....does anyone have any advice, suggestions or tips for me?