I'm working on a quote for a bride and I'm trying to figure out how many hydrangea petals I would need to go on either a 6 in or an 8 in cake. She mentioned a large hydrangea to one of my employees during the consultation so I think just something that looks big and full on top of the cake. I've made hydrangeas for cupcake toppers in groups of three but I haven't done a really big one. Just need to know approx. how many I would need so I can quote her accurately.