Ideal size for single round balloon centerpieces?
What is the ideal size for single round balloon centerpieces?
Should I do it with a 17" or 24" balloon?
Greetings all the way over to Brazil! I am not a 100% clear about your question, as you are talking about a centerpiece, but you have actually submitted a photo of a floor standing balloon column.
If your question refers to a table centerpiece with a single floating balloon, I would say it depends on the size of the tables and the room overall.
If the room is spacious enough, you'll achieve a more impressive look with the 24" balloons. If the room and/or tables are rather small, I would go for the 18" (I don't see 17" balloons in Qualatex' latex balloon chart).
Hope that helps,