Hello,

Can someone tell me what sizes I would need to do a 3 tier cake to feed 60 people?

Thanks!

I don't think that a 3 tier cake is possible for 60 people unless you are doing a mini tiered cake with a 4, 6, and 10 in round.
FYI Wilton has a chart that gives frequently used sizes to determine servings : http://www.wilton.com/cakes/making-cakes/baking-wedding-cake-2-inch-pans.cfm

Another option would be to use one dummy tier. That way you could give them a 12, 9,6 with the 9"er being styro.
BTW is it a wedding cake? I usually give the 6"er as their 'save for 1st anniversary' tier, so don't count that in the servings.

It's not a wedding cake, it's a 1st birthday cake.

Wow, I really thought that I'd need more cake than that. I was thinking of doing a 10/8/6 but didn't think that would be enough.

10-8-6 is perfect for 60 servings - if it's 4" tall per tier.

A 9", 7", & 4" serves 57.