AI'm making a full sheet (18x24) birthday cake and have to drop it off to the client. I've looked at Michaels and can't find a box large enough to fit it in. I have a golden retriever who loves car rides so of course there is hair floating around in my car. For those who own a dog you know you can vacuum all day and it's still not going to get it all up. So this cake HAS to be covered! Any ideas of an alternative or where I can find a large cake box?

AGoogle cake boxes. Or at least cover the cake with plastic wrap.

Party supply stores, anyplace that sells catering supplies, even your local bakeries should have a sheet cake box you can buy. Start calling around. I live in a dinky little town and there are several places where I can get a sheet cake box.  

AYou can even try your local costco or sams, just cover the top with cling.

ARestaurant supply store or Sam's bakery dept. will sell you one.