Cylinder glass vases are the base of a lot of different centerpieces and these come in a choice of 3 sizes; 10cm, 14cm and 20cm.
All of the vases have a diameter of 10cm.
You could have 3 vases of different heights in the center of the table with candles or flowers.
Or you could have floating candles with a submerged flower.
Whatever you choose these vases will look fantastic.