I have my first square 3 tier wedding cake next week with no filling...I'm not sure what size to use a 2 inch or 3 inch height...I was going to buy the wilton 3 pcs square cake pan but it wasn't but wasn't sure if i should buy the 3 psc at 2 inch or the singles at 3 inch...

hi, I would go for 3". Like tall cakes and all my cake tins are 3" high.

I have all 2 inch cake pans, I just use 2 layers. The 3 inch looks really good but I'm still satisfied with mine!

thats what I thought, thanks.

definitely depends on how tall you want each tier of cake.

I like the 4-4.5" tall tiers so I have 2" pans and then stack two layers for every tier.

But there are others who only do 3" pans and don't stack the cakes. It's all personal preference.

I have 3 inch pans. Once I level the cake there is about 2 to 2-1/4 inches of cake left over...fill that 1/4 inch and then add the other on top and the cake tier is just about 4 inches tall once it settles. Perfect!