I am struggling with this....I don't want my centerpieces to be too low, but how high can they be before they would obstruct the view of guests sitting opposite one another at a 60" table? Also what diameter are you going with? Meaning if I am going for a ball type look for the flowers how big around should it be? (to look balanced with the size of the table and the height of the vase?) I am alternating low floral centerpieces with tall candelabras (grrrr should I ever find them....) Anyone have any advice? Thanks!