I am making a huge wedding cake and my biggest size is a 14" and I have a 16" seperator plate since it will be tiered. Will this fit in a 16" box for transport. I need to get the boxes and this is holding me up. I need to transport and 18" boxes are hard to come by any advice?

Thanks

I never use boxes to transport wedding cakes.

I don't know where you live, but check out this website and you might be able to get it from a local bakery supply store.
http://www.oasisupply.com/Products/Products.asp?CategoryID=129
They do have boxes big enough for you to put your assembled cake.

What do you use?

see add'l responses on http://forum.cakecentral.com/cake-decorating-ftopicp-6045098.html#6045098

I just set the cake on top of non-skid in the back of my SUV and go. It will be sitting out for hours at the reception without a box and it's been sitting on my counter all night without a box.