What size vase should I use?

“What size vase should I use?” As a general guideline to help you decide, the vase should be between 40 to 50 percent of the length of the flowers. Ultimately as long as the vase is holding the flowers upright, holding sufficient water for at least a week and acts as a counterweight to the flowers so that the arrangement is not top heavy and fall down you will have made the perfect choice.