I have a bride that wants a 3 tiered cake and 2 side cakes to feed 150 people. Her cake topper won't fit on a 6" cake, and the top tier will not be served. I will need to start with an 8" top tier. Will it look out of balance if the 2 side cakes are bigger than the bottom tier? Help!!!

TIA
Jo

Why would you need to make them bigger?
To serve 150 use a 14, 10. 8 (about 110 servings) won't look bad; then use 8s (25 serv ea.) or 10s (39 ea) for the side cakes and you'll have plenty of servings.
When I have someone who won't be serving the top I often box it up and give it to a family member to keep for the couple. OR sometimes I slip it under the cake table.

Plus, these days, a topper isn't always on the top tier. Some are placed between the tiers....some are placed on a side cake that is placed on the table in front of the cake. Remove the paradigms!!