OK, I need a wedding cake to serve 200 people. I've only have a 6,8,10,12,and 14in round set. I've figured that a 8,10,12 and 14 will get me 196 servings, correct ? Just trying to find out if the 8 inch will look right as the top layer, is it to big ? Please help ASAP needing to get started baking.

Not unless you have a really big topper, like that extends past the edges of the 8, otherwise, it will look pretty squatty.

I've used an 8" as the top and didn't think it looked bad at all, but i'm only a hobby baker. good luck.

I actually never made a wedding cake, but if you prefer a smaller cake as the top layer and want your cake to be perfect you can use a 6 inch dummy cake!...
HTH

Well, if the total of your pan sizes adds up to 196, then adding the 6" layer will give you more than you need but not by much. Otherwise, a 6" dummy sounds like a good idea.

Yes, topping with a 6" (on top of the 8") will only give you 8 extra servings above the 200 needed. But I'd start by just stacking your pans upside down on each other with the 8" as the top tier and see how the proportions look to you. The base cake as a 14" may be big enough that an 8" on top is fine.

you could always scale down the size of your cakes to a size you are happy with and make an additional cutting cake for the extra portions

when I started making cakes, the 8" round was the standard for a top tier. Toppers just need to be proportionate, which is common sense. I don't think they need to overhang the edges (toppers don't overhang the edge of 6" top tiers ... it's all proportional).

but I also agree that just adding a 6" cake to your existing plan will work fine.