I'm making a practice mini wedding cake. Well, I read somewhere that each cake should be 4-5 inches high. But it looks kinda tall. Unfrosted the cake is 4 inches. Frosted and filled at least 5. Hmm. What do you think? (I could just sit on it after I'm done I guess... )
one 'tier' is two 2" layers of cake.
once i level each layer of cake, torte it, fill it, stack the two layers together, the total height of the completed tier its about 4 1/2 inches tall.
5" would suggest too much filling to me.
5" is just fine - especially if it's just a practice cake. My standard is 4" (tho I also regularly do 3" to shave servings off) but that is without icing and boards so the finished product ends up more like 4.5". Taller tiers (like 6") are also in vogue - so just do whatever you want. There is no such thing as rules with stuff like this 
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