Wanted to practice tupsy turvy(2 tier) and baked an 8 in and 10 inch....should i have made it a 6 inch and 10 inch? I know i could always cut it down but I wasn't sure what the standard sizes differences are on these...thanks for any help

I find it's much better to have at least a 3"-4" difference in diam. between the tiers.

Makes it easier to carve out the hole and sink the other tier inside, if that's the way you're doing yours? That way, you still have a nice portion of rim/edge around the cake for all your detailing/decor, etc.

thanks...I think i will have A LOT of trimming to do tomorrow

What I do is graduated layers, for ex. 6-7-8, stacked on top of 8-9-10. There is less wast and its easier to carve and get the right shape.