I'm having a winter wedding a week before Christmas so we're doing a cylinder vase with Christmas balls in them with a flower topiary on top! My only worry is that they're going to be too tall. Right now we're planning on using 12" vases with the height of the topiary added on top. Are the centeripieces going to be in people's ways with them being this tall? What size would be best for such a set up? Thank you!!