will my cake be sturdy if it is 6,8,10,12 even with the dowls in it? I just worry because there is only an inch on each side. Any help with be appreciated

thank you!

I think it should be fine-bump for other opinions

As long as each tier has the correct supports in it you will be fine. I personally use bubble tea straws - and others swear by the SPS system. I do not like to use just regular dowels, they displace the cake, and if one is not perfectly centered, it is not stable.

I am doing this very sized cake for a wedding in July and everyone has told me the same thing...use SPS.