How do you determine what size to make for a 6", 8" and 10' round cake ... ???
TIA

I would line the 6" cake pan with waxed paper, put a blob of melted candy coating in the middle, and start building the bow that way. Once it's all assembled, let the candy coating harden before you take the bow out of the pan. You'll end up with a bow that's no bigger than the top of the top tier.

I'm so sorry I did not make myself clear ...
I meant to ask if making cakes in each one of those sizes, not as a three tiered stacked cake ...
Thank you again !!!

Are you asking how big you make your loops?

If so I use the size of the cake that I need for them. If it is a 10 in cake, I think okay I want a 8 to 9 in bow. So when I cut the loops I cut the largest loops about 8in long. Folded in half they will be about 4in. long.

That is exactly what I was asking ... thank you much !!!